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JavaScript Output

You can get JavaScript code output by following ways.

1. innerHTML

To access an HTML element, JavaScript can use the document.getElementById(id) method. The id attribute defines the HTML element. The innerHTML property defines the HTML content. You can get output by using innerHTML method as following example.

<p id="demo"></p>
<script>
document.getElementById("demo").innerHTML = 2 + 3;
</script>

Output

2. document.write()

You can get output by using document.write() method as following example.

<script>
document.write(1 + 3);
</script>

Output

3. window.alert()

You can use an alert box to display data as following example.

<script>
function test(){
window.alert(4 + 3);
}
</script>
<button onClick="test()">click here to display output in alert box.</button>

Output

4.console.log()

For debugging purposes, you can use the console.log() method to display data.

<script>
console.log(2 + 6);
</script>

Output

You can see Output in browser console