Format
#include <math.h> double fabs(double x);
Language Level: ANSI
Threadsafe: Yes.
Description
The fabs() function calculates the absolute value of the floating-point argument x.
Return Value
The fabs() function returns the absolute value. There is no error return value.
Example that uses fabs()
This example calculates y as the absolute value of x:
#include <math.h> #include <stdio.h> int main(void) { double x, y; x = -5.6798; y = fabs(x); printf("fabs( %lf ) = %lf\n", x, y); } /******************* Output should be similar to: *************** fabs( -5.679800 ) = 5.679800 */
Related Information
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