We use the addition operator + to add two or more numbers.

Example 1: Add Two Numbers

let num1 = 5;
let num2 = 3;

// add two numbers
let sum = num1 + num2;

// display the sum
console.log('The sum of ' + num1 + ' and ' + num2 + ' is: ' + sum);

Output

The sum of 5 and 3 is: 8

Example 2: Add Two Numbers Entered by the User

// store input numbers
let num1 = prompt('Enter the first number ');
let num2 = prompt('Enter the second number ');

//add two numbers
let sum = num1 + num2;

// display the sum
console.log(`The sum of ${num1} and ${num2} is ${sum}`);

Output

Enter the first number 5
Enter the second number 3
The sum of 5 and 3 is: 8

The above program asks the user to input two numbers. Here, prompt() is used to take inputs from the user.

let num1 = prompt('Enter the first number ');
let num2 = prompt('Enter the second number ');

Then, the sum of the numbers is computed.

let sum = num1 + num2;

Finally, the sum is displayed. To display the result, we have used the template literal ` `. This allows us to include variables inside strings.

console.log(`The sum of ${num1} and ${num2} is ${sum}`);

To include variables inside ``, you need to use the ${variable} format.