add insertion_sort.py

Author: avk29

classical_algorithms/python/Insertion Sort.py

@@ -0,0 +1,27 @@
+def insertion_sort(array):
+    
+    for i in range(1,len(array)):
+        j = i-1
+        key = array[i]
+        
+        #move all the elements of array[0,i-1] that are greater than
+        #the key, one position ahead of their current one
+        
+        while j>=0 and array[j]>key:
+            array[j+1] = array[j]
+            j = j-1
+        
+        array[j+1] = key
+    
+    print(array)
+    
+
+m = int(input('Enter the number of elements in the array '))
+
+mylist = []
+
+for i in range(0,m):
+    num = int(input('Enter element: '))
+    mylist.append(num)
+
+insertion_sort(mylist)