What does fabs function mean in c language

fabs function calculates the absolute value of a floating-point number, that is, regardless of the size of the sign. fabs(x) returns x for positive x and -x for negative x.

What is the fabs function in C language?

fabs function is a mathematical function defined in the C standard library, used to calculate the absolute value of floating point numbers. Absolute value refers to the size of a number regardless of its sign.

fabs Function definition:

<code class="c">double fabs(double x);</code>

Parameters:

• x: To be calculated The absolute value of the target floating-point number.

Return value: The absolute value of

• x. If x is positive, x is returned, if x is negative, -x is returned.

Example:

<code class="c">#include <stdio.h>
#include <math.h>

int main() {
    double num = -123.45;
    double absolute_value = fabs(num);

    printf("绝对值：%.2f\n", absolute_value);

    return 0;
}</code>

Output:

<code>绝对值：123.45</code>

Note:

• fabs function can only be used for floating point numbers, not for integers.
• fabs function will not modify the value of the original variable x, it returns a new floating point number.

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