Updated Arrays.js

Author: AyushShri

arrays.js

@@ -1,18 +1,62 @@
                                                            Arrays
-Arrays are lists of ordered, stored data. They can hold items that are of any data type. 
+-- Arrays are lists of ordered, stored data. They can hold items that are of any data type. 
 Arrays are created by using square brackets, with individual elements separated by commas.
 
 // An array containing numbers
 const numberArray = [0, 1, 2, 3];
 
 // An array containing different data types
 const mixedArray = [1, 'chicken', false];
-Index
+
+
+-- Index
 Array elements are arranged by index values, starting at 0 as the first element index. Elements can be accessed by their index using the array name, and the index surrounded by square brackets.
 
 // Accessing an array element
 const myArray = [100, 200, 300];
 
 console.log(myArray[0]); // 100
 console.log(myArray[1]); // 200
-console.log(myArray[2]); // 300
+console.log(myArray[2]); // 300
+
+
+-- Mutable
+JavaScript arrays are mutable, meaning that the values they contain can be changed.
+
+Even if they are declared using const, the contents can be manipulated by reassigning internal values or using methods like .push() and .pop().
+
+const names = ['Alice', 'Bob'];
+
+names.push('Carl');
+// ['Alice', 'Bob', 'Carl']
+
+
+-- Property .length
+The .length property of a JavaScript array indicates the number of elements the array contains.
+
+const numbers = [1, 2, 3, 4];
+
+numbers.length // 4
+
+
+--Method .push()
+The .push() method of JavaScript arrays can be used to add one or more elements to the end of an array. .push() mutates the original array returns the new length of the array.
+
+// Adding a single element:
+const cart = ['apple', 'orange'];
+cart.push('pear'); 
+
+// Adding multiple elements:
+const numbers = [1, 2];
+numbers.push(3, 4, 5);
+
+
+-- Method .pop()
+The .pop() method removes the last element from an array and returns that element.
+
+const ingredients = ['eggs', 'flour', 'chocolate'];
+
+const poppedIngredient = ingredients.pop(); // 'chocolate'
+console.log(ingredients); // ['eggs', 'flour']
+
+