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‎README.md

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### Aim
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In this experiment, user will learn the concepts of string in Python programming language.
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To implement the operations that can be performed in a string.
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### Theory
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<h3>String</h3>
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We can access a string using indexing. In a string each character is assigned with a unique index value which starts from 0. A string can be written in both single quotes and double quotes.
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Example : 'Hello World'<br>
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"Hello World"<br>
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s = "Hello World"<br>
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Python allows negative indexing as well.
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Example : -1, -3, -5.
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Where -1 refers to the last index, -2 refers to second last index and so on.
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Printing here can be done by placing the string in single or double quotes after print.
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<br>
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print("Hello World")<br><br>
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<h4>Concatenation</h4>
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A string in python is immutable i.e. it can not be changed once defined. But concatenation is still possible<br>
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s = 'Hello World'<br>
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s = s +"Example<br>
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Now the string will be as "Hello WorldExample".<br>
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<h4>Repetition</h4>This is a unique property of strings in Python programming language. When a string is multiplied with an integer, the characters of string are multiplied the same number of times.
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Syntax : string*integer<br>
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s="k"<br>
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s=s*5<br>
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Now the string will be "kkkkk". It has repeated itself 5 times.<br>
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<h4>Slicing</h4>Slicing is done in Python to select or display the desired number of characters in a string. It is done with the help of symbol ':'.
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Syntax : String[ index: ]
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<br>
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s="Hello World"<br> 1) s = s[2:]<br>
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2. s = s[1:8]<br>
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Here the 1st example will give output "llo World". All the characters from and after second index is selected.
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In the 2nd example output will be "ello Wo". Characters between index number 1 and 8 are selected.
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Length of a string can be calculated using the len function.
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Syntax : len("string")<br>
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len("Hello World"<br>
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It will return 11.<br>
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### Procedure
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<h4>Steps of simulator </h4><br>
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1.&nbsp;Select the problem.<br>
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2.&nbsp; Read the simulator details.<br>
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3.&nbsp;Enter the desired input you want to operate.<br>
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4.&nbsp; Press CALCULATE to proceed. <br>
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5.&nbsp;The code will be displayed <br>
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6.&nbsp;Press NEXT to see the execution of code. <br>
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7.&nbsp;Relevant line in the code will be highlighted.<br>
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8.&nbsp;The local variables will be shown in the Output Panel with their values.<br>
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### Pre Test
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1. Q.1 What is the output of the following code?
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str1="Virtual PythonLab"
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str1[3]='s'
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print(str1)
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<br>
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A.<input type="radio" name="but" id="rb11" onclick="click1();">&nbsp;Virtual Python Lab
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<br>
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B.<input type="radio" name="but" id="rb12" onclick="click1();">&nbsp;Virtual
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<br>
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C.<input type="radio" name="but" id="rb13" onclick="click1();">&nbsp;Error
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<br>
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D.<input type="radio" name="but" id="rb14" onclick="click1();">&nbsp;Virsual Python Lab
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<br>
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<p id = "p1"></p>
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<br>
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2. What is the output of given string??
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str1="Virtual"
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str2="Python"
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str3=str1+str2
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print(len(str3))
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<br>
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A. <input type="radio" name="but2" id="rb21" onclick="click2();">&nbsp;10
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<br>
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B. <input type="radio" name="but2" id="rb22" onclick="click2();">&nbsp;11
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<br>
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C. <input type="radio" name="but2" id="rb23" onclick="click2();">&nbsp;12
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<br>
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D. <input type="radio" name="but2" id="rb24" onclick="click2();">&nbsp;13
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<br><br>
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<p id = "p2"></p>
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<br>
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3. What arithmetic operators cannot be used with strings?
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<br>
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A. <input type="radio" name="but4" id="rb41" onclick="click4();">&nbsp;+
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<br>
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B. <input type="radio" name="but4" id="rb42" onclick="click4();">&nbsp;*
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<br>
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C. <input type="radio" name="but4" id="rb43" onclick="click4();">&nbsp;-
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<br>
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D. <input type="radio" name="but4" id="rb44" onclick="click4();">&nbsp;All of the mentioned
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<br><br>
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<p id = "p4"></p>
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<br>
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4. What is th output of "virtual"+1+2+"python"
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<br>
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A. <input type="radio" name="but3" id="rb31" onclick="click3();">&nbsp;vitual3python
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<br>
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B. <input type="radio" name="but3" id="rb32" onclick="click3();">&nbsp;Error
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<br>
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C. <input type="radio" name="but3" id="rb33" onclick="click3();">&nbsp;virtual12python
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<br>
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D. <input type="radio" name="but3" id="rb34" onclick="click3();">&nbsp;virtualpython
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<br><br>
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<p id = "p3"></p>
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<br>
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5. 5 If y="123"what will be the the return type of type(y)?
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<br>
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A.<input type="radio" name="but" id="rb11" onclick="click1();">&nbsp;str
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<br>
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B.<input type="radio" name="but" id="rb12" onclick="click1();">&nbsp;int
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<br>
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C.<input type="radio" name="but" id="rb13" onclick="click1();">&nbsp;bool
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<br>
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D.<input type="radio" name="but" id="rb14" onclick="click1();">&nbsp;String
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<br>
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<p id = "p1"></p>
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<br>
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### Post Test
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1. What is the output of the following code?[A]
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class customer:
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def**init**(self,id):
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self.id=str(id)
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id="2010"
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obj=customer(2567)
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print(obj.id)
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<br>
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A.<input type="radio" name="but" id="rb11" onclick="click1();">&nbsp;. 2567
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<br>
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B.<input type="radio" name="but" id="rb12" onclick="click1();">&nbsp; Error
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<br>
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C.<input type="radio" name="but" id="rb13" onclick="click1();">&nbsp; 2010
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<br>
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D.<input type="radio" name="but" id="rb14" onclick="click1();">&nbsp; None
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<br>
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<p id = "p1"></p>
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<br>
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2. What is the output of following Python program?[B]
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text='Python is high-level programming language'
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words=text.split()
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l=len(words)
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print('Number of words of the text:%d'%l)
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<br>
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A. <input type="radio" name="but2" id="rb21" onclick="click2();">&nbsp; Error
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<br>
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B. <input type="radio" name="but2" id="rb22" onclick="click2();">&nbsp;5
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<br>
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C. <input type="radio" name="but2" id="rb23" onclick="click2();">&nbsp; 6
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<br>
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D. <input type="radio" name="but2" id="rb24" onclick="click2();">&nbsp;None of these
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<br><br>
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<p id = "p2"></p>
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<br>
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3. What is the output when following code is executed?[C]
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str1="virtualpythonlab"
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print(str1[6::-2])
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<br>
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A. <input type="radio" name="but4" id="rb41" onclick="click4();">&nbsp;pylab
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<br>
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B. <input type="radio" name="but4" id="rb42" onclick="click4();">&nbsp; lautriv
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<br>
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C. <input type="radio" name="but4" id="rb43" onclick="click4();">&nbsp; lurv
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<br>
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D. <input type="radio" name="but4" id="rb44" onclick="click4();">&nbsp;pati
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<br><br>
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<p id = "p4"></p>
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<br>
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4. What is the output of the following code?[D]
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defchangement(str1):
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char=str1[0]
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str1=str1.replace(char,'&')
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str1=char+str1[1:]
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returnstr1
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print(changement('this is the string'))
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<br>
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A. <input type="radio" name="but3" id="rb31" onclick="click3();">&nbsp;Syntax Error
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<br>
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B. <input type="radio" name="but3" id="rb32" onclick="click3();">&nbsp;this is the string
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<br>
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C. <input type="radio" name="but3" id="rb33" onclick="click3();">&nbsp;&his is &hes &tring
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<br>
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D. <input type="radio" name="but3" id="rb34" onclick="click3();">&nbsp;this is &he s&tring
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<br><br>
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<p id = "p3"></p>
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<br>
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### References
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<p style="font-size:100%; margin-top:2%">
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<br>
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www.learnpython.org/en/Basic_String_Operations

‎aim.md

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In this experiment, user will learn - <br>The concepts of string in Python programming language.
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<br>To implement the operations that can be performed in a string.

‎assesment.log

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=/pretest.json
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{
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_: [],
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f: [
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'/home/runner/work/exp-strings-iitk/exp-strings-iitk/experiment/pretest.json'
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],
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files: [
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'/home/runner/work/exp-strings-iitk/exp-strings-iitk/experiment/pretest.json'
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],
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c: 'assessment',
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contentTypes: 'assessment',
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'content-types': 'assessment',
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'$0': 'validate'
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}
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Validated true
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=/posttest.json
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{
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_: [],
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f: [
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'/home/runner/work/exp-strings-iitk/exp-strings-iitk/experiment/posttest.json'
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],
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files: [
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'/home/runner/work/exp-strings-iitk/exp-strings-iitk/experiment/posttest.json'
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],
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c: 'assessment',
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contentTypes: 'assessment',
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'content-types': 'assessment',
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'$0': 'validate'
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}
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Validated true

‎assets/css/bootstrap.min.css

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Some generated files are not rendered by default. Learn more about customizing how changed files appear on GitHub.

‎assets/css/common-styles-responsive.css

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.slidecontainer {
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text-align: center;
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}
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.slider {
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width: 10%;
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}
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.text-box {
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padding: 7px 20px;
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margin: 8px 0;
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box-sizing: border-box;
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width: 14%;
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}
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.legend { list-style: none; }
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.legend li { padding-bottom : 1.5vw; width: 20vw; }
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.legend span { border: 0.1vw solid black; float: left; border-radius: 50%;}
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.legend .grey { background-color: grey; }
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.legend .green { background-color: #a4c652; }
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.legend .black { background-color: black; }
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.button-input {
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border-radius: 50vw;
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background-color: #288ec8;
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border: none;
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color: white;
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padding: 1%;
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margin-left: 1%;
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margin-right: 1%;
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padding-bottom: 1%;
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padding-top: 1%;
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padding-left: 2%;
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padding-right: 2%;
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}
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.button-input:hover {
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background-color:gray;
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cursor:pointer;
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}
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.comment-box {
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position: relative;
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padding: 1vw;
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width: 30vw;
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text-align: center;
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}
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.instruction-box {
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position: relative;
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width: 100%;
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transition: width 0.2s ease-out;
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border: 0.1vw solid grey;
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z-index : 10;
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}
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.collapsible {
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background-color: Transparent;
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color: "grey";
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cursor: pointer;
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width: 100%;
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border: none;
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text-align: center;
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outline: none;
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font-weight: bold;
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padding-top: 1%;
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padding-bottom: 1%;
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}
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.collapsible::-moz-focus-inner {
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border: 0;
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}
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.active, .collapsible:hover {
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background-color: "white";
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}
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/*The unicode \25BE is for ▾ (Dropdown arrow) */
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.collapsible:after {
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content: "\25BE";
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color: "grey";
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font-weight: bold;
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float: right;
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margin-left: 5px;
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}
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.active:after {
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content: "\25B4";
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}
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.content {
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padding: 0 1.8vw;
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max-height: 0;
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overflow: hidden;
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transition: max-height 0.2s ease-out;
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background-color: "white";
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}

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