JavaScript | Math.trunc( ) Function

The Math.trunc() function in JavaScript is used to return the integer part of a floating-point number by removing the fractional digits. In other words, Math.trunc() function cuts off the dot and the digits to the right of it.

Syntax:

Math.trunc(value)

Parameters: This function accepts a single parameter value . It is the floating-point number which is to be sent to the Math.trunc() function.

Return Value: The Math.trunc() function returns the integer part of the given number.

Below example illustrates the Math.trunc() function in JavaScript:

1. When a positive number of float type is passed as a parameter:

   <script type="text/javascript">    document.write(Math.trunc(15.56));          </script>

   Output:

   15

2. When a negative number of float type is passed as a parameter:

   <script type="text/javascript">    document.write(Math.trunc(-15.56));          </script>

   Output:

   -15

3. When a positive number between 0 and 1 is passed as a parameter:

   <script type="text/javascript">    document.write(Math.trunc(0.236));          </script>

   Output:

   0

4. When a negative number between 0 and 1 is passed as a parameter:

   <script type="text/javascript">    document.write(Math.trunc(-0.236));          </script>

   Output:

   0