JavaScript program to swap two variables using es6(ES2015) destructuring assignment

Situatie

Here, a new es6 feature, called destructuring assignment [a, b] = [b, a], is used to swap the value of two variables. If [a, b] = [1, 2, 3], the value of a will be 1 and value of b will be 2.

First a temporary array [b, a] is created. Here the value of [b, a] will be [2, 4].
The destructuring of the array is done, i.e [a, b] = [2, 4].
As a result, the value of the variables are swapped.

Solutie

Pasi de urmat

//JavaScript program to swap two variables

//take input from the users
let a = prompt(‘Enter the value of a: ‘);
let b = prompt(‘Enter the value of b: ‘);

//using destructuring assignment
[a, b] = [b, a];

console.log(`The value of a after swapping: ${a}`);
console.log(`The value of b after swapping: ${b}`);

Output

Enter the first variable: 4
Enter the second variable: 2
The value of a after swapping: 2
The value of b after swapping: 4

Tip solutie

Permanent

Follow Us