In this source code example, you will learn how to add two numbers and display their sum in JavaScript. We use the addition operator + to add two or more numbers.
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JavaScript Add Two Numbers
function add(num1, num2){
// add two numbers
return num1 + num2;
}
let num1 = 10;
let num2 = 20;
let sum = add(num1, num2);
// display the sum
console.log('The sum of ' + num1 + ' and ' + num2 + ' is: ' + sum);
Output
The sum of 10 and 20 is: 30
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