JavaScript truncate

The JavaScript truncate function (trunc(x)) is a Math function. The trunc function is used to remove the decimal values from specified expression and return the integer value. The syntax of the JavaScript truncate Function is:


Number: It can be a decimal or a numerical expression

  • If the number argument is a positive or negative number, JavaScript trunc function will return the truncated value.
  • If it is not a number, the trunc function will return NaN, and if it is Null, it will return Zero.

JavaScript truncate Function Example

The JavaScript truncate Function removes the decimal values and returns the integer value. In this Truncate example, We are going to find the truncated values of different data types using trunc() and display the output

  • First, we used it on the Positive Decimal values.
  • Next two statements, We used the JavaScript trunc Function on the negative Decimal numbers.
  • Next, we tried on the string text. It will return NaN (Not a Number) as output
  • Last, we tried JS trunc math method on Null value and it returns Zero
<!DOCTYPE html>
    <title> JavaScriptTRUNCATE Function </title>
  <h1> JavaScriptTRUNC 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>
    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);
JavaScript TRUNCATE Function