Menu
×
   ❮     
HTML CSS JAVASCRIPT SQL PYTHON JAVA PHP HOW TO W3.CSS C C++ C# BOOTSTRAP REACT MYSQL JQUERY EXCEL XML DJANGO NUMPY PANDAS NODEJS R TYPESCRIPT ANGULAR GIT POSTGRESQL MONGODB ASP AI GO KOTLIN SASS VUE DSA GEN AI SCIPY AWS CYBERSECURITY DATA SCIENCE
     ❯   

C++ cmath trunc() function

❮ Math Functions


Example

Truncate numbers:

cout << trunc(0.60);
cout << trunc(0.40);
cout << trunc(5);
cout << trunc(5.1);
cout << trunc(-5.1);
cout << trunc(-5.9);
Try it Yourself »

Definition and Usage

The trunc() function truncates a number, which means returning only the integer part of the number.

The trunc() function is defined in the <cmath> header file.


Syntax

One of the following:

trunc(double number);
trunc(float number);

Parameter Values

Parameter Description
number Required. Specifies a number. If the number is an integer type then it will be treated as a double.

Technical Details

Returns: A float value (if the argument is float) or double value (in any other case) representing the integer part of a number.

❮ Math Functions

×

Contact Sales

If you want to use W3Schools services as an educational institution, team or enterprise, send us an e-mail:
sales@w3schools.com

Report Error

If you want to report an error, or if you want to make a suggestion, send us an e-mail:
help@w3schools.com

W3Schools is optimized for learning and training. Examples might be simplified to improve reading and learning. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. While using W3Schools, you agree to have read and accepted our terms of use, cookie and privacy policy.

Copyright 1999-2024 by Refsnes Data. All Rights Reserved. W3Schools is Powered by W3.CSS.