02 Functions JS

Learned about functions, how to use rest operator, how to use objects with functions and arrays with functions.

Author: aayushyadavz

03_Basics/02_functions.js

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+/* 2. Functions
+
+Note: Here, ... is known as Rest Operator. */
+function calculateCartPrice(...num1) {
+    return num1
+}
+console.log(calculateCartPrice(200, 300, 400)); /* Output: [ 200, 300, 400 ]
+
+if, */
+function calculateCartPrice(val1, val2, ...num1) {
+    return num1
+}
+console.log(calculateCartPrice(200, 300, 400, 500)); /* Output: [ 400, 500 ]
+Note: 200, 300 will go in val1 and val2. 
+
+------------------------------------------------------------------------------------
+
+Function with Object, */
+const user = {
+    username: "Ayush",
+    price: 199
+}
+
+function handleObject(anyObject) {
+   console.log(`Username is ${anyObject.username} and price is ${anyObject.price}`);
+}
+handleObject(user) /* Output: Username is Ayush and price is 199
+We can directly pass objects here, */
+handleObject({
+    username: "sam",
+    price: 300
+}) /* Output: Username is sam and price is 300
+
+-------------------------------------------------------------------------------------
+
+Function with Array, */
+const myNewArr = [200, 300, 400, 500]
+
+function returnSecondValue(getArr){
+    return getArr[1];
+}
+console.log(returnSecondValue(myNewArr)); /* Output: 300
+We can directly pass Array here, */
+console.log(returnSecondValue([300, 400, 500, 600])); // Output: 400