JavaScript truncate number | trunc( ) Method example

Use trunc() method in JavaScript to get truncate number. Where this method returns the integer part of a number. It’ simply remove the decimals.

Note: This method will NOT round the number up/down to the nearest integer.

Syntax

Math.trunc(num)

Example of JavaScript truncate number | trunc( ) Method

Let’s cuts off the dot and the digits to the right of it in JS.

<!DOCTYPE html> 
    <html> 
    <body> 
            <script language="JavaScript">
                var num = 10.85;
                var n = Math.trunc(num)
                alert(n);
            </script>     
    </body> 
    </html> 

Output:

JavaScript truncate number trunc Method

Q: How to truncate float in JavaScript?

Answer: Use toFixed() function.

(6.688689).toFixed(); // equal to 7
(6.688689).toFixed(1); // equal to 6.7
(6.688689).toFixed(2); // equal to 6.69

Do comment if you have any doubts and suggestion on this tutorial.

Note: The All JS Examples codes are tested on the Firefox browser and the Chrome browser.

OS: Windows 10

Code: HTML 5 Version


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