JavaScript Math trunc() method

The JavaScript math trunc() method removes the fractional part of the given number and returns the remaining integer part only.

Syntax

The trunc() method is represented by the following syntax:

Parameter

num - A number.

Return

The integer part of the given number.

JavaScript Math trunc() method example

Here, we will understand trunc() method through various examples.

Example 1

Let's see an example to print integer part of the given numbers.

<script>
document.writeln(Math.trunc(12.24)+ "<br>");
document.writeln(Math.trunc(0.84));
</script>

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Output:

12
0

Example 2

In this example, we will use trunc() method with negative numbers.

<script>
document.writeln(Math.trunc(-12.24)+ "<br>");
document.writeln(Math.trunc(-0.84));
</script>

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Output:

-12
0

Example 3

Here, you can test trunc() method with your own test cases.

<script>
function display()
{
  var x=document.getElementById("num").value;
document.getElementById("result").innerHTML=Math.trunc(x);
}
</script>
<form>
  Enter a number: <input type="text" id="num">
  <input type="button"  onclick="display()" value="submit">
  </form>
  <p><span id="result"></span></p>

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