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C 语言 Math sqrt() 函数

❮ 数学函数


示例

返回不同数字的平方根

printf("%f", sqrt(0));
printf("%f", sqrt(1));
printf("%f", sqrt(9));
printf("%f", sqrt(0.64));
printf("%f", sqrt(-25));
自己尝试 »

定义和用法

sqrt() 函数返回一个数字的平方根。

sqrt() 函数在 <math.h> 头文件中定义。


语法

以下之一

sqrt(double number);

参数值

参数 描述
number 必需。指定一个数字。

技术细节

返回值 一个 double 值,表示数字的平方根。

❮ 数学函数


相关页面

C 函数教程

C 数学函数教程


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