JavaScript Program to Add Two Numbers

We will explore how to add two numbers in JavaScript. Adding two numbers in JavaScript means combining numeric values together using arithmetic addition, which gives us their total sum.

There are several methods that can be used to Add Two Numbers in JavaScript, which are listed below:

Using + Operator

In this approach we add two numbers in JavaScript involves using the + operator to perform arithmetic addition on numeric variables, resulting in their sum.

Syntax:

x + y;

Example: In this example, we are adding two numeric values by using the + operator.

Javascript

let num1 = 10;
let num2 = 10;
let sum = num1 + num2;
console.log("Sum :", sum);

Output

Sum : 20

Using function

In this approach, we are adding two numbers using a function in JavaScript involves defining a custom function that takes two parameters, adds them, and returns the result.

Syntax:

function additionFunction(a, b) {
    return a + b;
}

Example: In this example we are using the above-explained approach.

Javascript

function additionFunction(a, b) {
    return a + b;
}

let num1 = 5;
let num2 = 10;
let sum = additionFunction(num1, num2);
console.log("Sum of given numbers is :", sum);

Output

Sum of given numbers is : 15

Using Arrow function

Adding two numbers using an arrow function in JavaScript involves creating a concise function syntax that adds parameters and returns the sum.

Syntax:

let addition = (a, b) => a + b;

Example: In this example we are using arrow function to add two numbers.

Javascript

let addition = (a, b) => a + b;

let num1 = 25;
let num2 = 25;
let sum = addition(num1, num2);
console.log("Sum of given numbers is :", sum);

Output

Sum of given numbers is : 50

Using Addition Assignment (+=) Operator

In this approach we use Addition Assignment (+=) operator in which operator Sums up left and right operand values and then assigns the result to the left operand.

Syntax:

Y += 1 gives Y = Y + 1 

Example: In this example we are using the above-explained approach.

Javascript

let num1 = 15;
let num2 = 10;

// Equivalent to num1 = num1 + num2
num1 += num2;
console.log("Sum of the given number is :", num1);

Output

Sum of the given number is : 25