# Addition of two numbers in JavaScript using functions | Example code

Create a simple function with parameters and use the + operator to add two or more numbers in the JavaScript function.

This code snippet is used to find the sum of two integer numbers using the JavaScript function.

``````<script>

const num1 = 5;
const num2 = 3;

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

// display the sum
console.log('The sum of ' + num1 + ' and ' + num2 + ' is: ' + sum);
}
// call function
</script>``````

## Addition of two numbers in JavaScript using functions Example

Let’s see HTML examples code:-

### Add Two Numbers with parameters

``````<!DOCTYPE html>
<html>

<script>

function sum(a, b){
var c = a+b;
return c;
}

</script>

<body>

</body>
</html>``````

Output:

### Add Two Numbers Entered by the User

Add two integer numbers and display the result in textbox with JavaScript.

``````<!DOCTYPE html>
<html>
<body>

<div class="container-fluid">
<input type="text" name="number1" id="number1"> <br>

<input type="text" name="number2" id="number2"><br>
<button type="button" onclick="submit1()">submit</button><br>

<p id="result"></p>
</div>

<script>
function submit1(){
var a =  document.getElementById("number1").value;
var b =  document.getElementById("number2").value;
var c = parseInt(a) + parseInt(b);

document.getElementById("result").innerHTML="Sum of number is:" + c;
}
</script>

</body>
</html>``````

Output:

Do comment if you have any doubts on this topic and code. Suggestions are always welcome.

Note: The All JS Examples codes are tested on the Firefox browser and the Chrome browser.

OS: Windows 10

Code: HTML 5 Version

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