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JavaScript Truncate

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The JavaScript Truncate function (trunc(x)) is one of the JavaScript Math function and it is used to remove the decimal values from specified expression and return the integer value. In this article we will show you, How to use trunc() function in JavaScript Programming language with example.

Syntax of a JavaScript Truncate Function

The basic syntax of the Truncate Function in JavaScript Programming language is as shown below:

Math.trunc(number);

Number: It can be a decimal or a valid numerical expression on which you want to Truncate.

  • If the number argument is positive or negative number, trunc() function will return the truncated value.
  • If the number argument is not a number, trunc() function will return NaN.
  • If the number argument is Null, trunc() function will return Zero.

JavaScript Truncate Function Example

The JavaScript Truncate Function allows you to remove the decimal values from specified expression and return the integer value. In this example, We are going to find the truncated values of different data types using trunc() and display the output

JAVASCRIPT CODE

<!DOCTYPE html>
<html>
<head>
    <title> JavaScript TRUNCATE Function </title>
</head>
<body>
  <h1> JavaScript TRUNC Function </h1>
  <p id = "Pos"></p>
  <p id = "Neg"></p>
  <p id = "Dec"></p>
  <p id = "Neg_Dec"></p>
  <p id = "Str"></p>
  <p id = "Null"></p>
  <script>
    document.getElementById("Pos").innerHTML = Math.trunc(10.95);
    document.getElementById("Dec").innerHTML = Math.trunc(10.05);
    document.getElementById("Neg").innerHTML = Math.trunc(-14.95);
    document.getElementById("Neg_Dec").innerHTML = Math.trunc(-14.05);
    document.getElementById("Str").innerHTML = Math.trunc("JavaScript");
    document.getElementById("Null").innerHTML = Math.trunc(null);
  </script>
</body>
</html>

ANALYSIS

  1. First two statements, We used the trunc() Function directly on both the Positive Decimal values.
  2. Next two statements, We used the trunc() Function directly on both the negative Decimal values.
  3. Next statement, We tried trunc() Function on String value. As we said before, this will return NaN (Not a Number) as output
  4. Last, We tried trunc() Function on Null value and it return Zero as output

OUTPUT

JavaScript TRUNCATE Function

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