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 标准库 abs() 函数

❮ C 标准库


示例

显示整数的绝对值

int value = abs(-5);
printf("%d", value);
尝试一下 »

定义和用法

abs() 函数返回数字的绝对值(正值)。

abs() 函数在 <stdlib.h> 头文件中定义。

该函数还有两个变体:labs() 用于 long int 参数,llabs() 用于 long long int 参数。

注意:abs() 函数仅适用于 int 类型的值。对于 floatdouble 类型的值,请改用 fabs() 函数。


语法

以下之一

abs(int number);
labs(long int number);
llabs(long long int number);

参数值

参数 描述
number 必需。指定一个数字。

技术细节

返回 abs() - 一个 int 值。
labs() - 一个 long int 值。
llabs() - 一个 long long int 值。
返回值表示指定数字的绝对值。

❮ C 标准库

×

Contact Sales

If you want to use W3Schools services as an educational institution, team or enterprise, send us an e-mail:
[email protected]

Report Error

If you want to report an error, or if you want to make a suggestion, send us an e-mail:
[email protected]

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.