An array is a special variable that can hold multiple values under a single name. Arrays can hold numbers, strings, objects, functions, or even other arrays . Arrays are zero-indexed , meaning the first element is at index 0 . Example: let fruits = [ "Apple" , "Banana" , "Orange" ]; console . log (fruits[ 0 ]); // Apple console . log (fruits[ 2 ]); // Orange 2. Creating Arrays a) Using square brackets [] (most common) let numbers = [ 1 , 2 , 3 , 4 , 5 ]; b) Using Array constructor let colors = new Array ( "Red" , "Green" , "Blue" ); c) Creating an empty array let emptyArr = []; 3. Accessing Array Elements Use index to access elements. let arr = [ "A" , "B" , "C" ]; console . log (arr[ 0 ]); // A console . log (arr[ 2 ]); // C You can also modify elements using the index: arr[ 1 ] = "Z" ; console . log (arr); // ["A", "Z...