FABS(3) Linux Programmer's Manual FABS(3)

fabs, fabsf, fabsl - absolute value of floating-point number

#include <math.h>

double fabs(double x);

float fabsf(float x);

long double fabsl(long double x);

Link with -lm.

The fabs() functions return the absolute value of the floating-point number x.

No errors can occur.

The fabs() function conforms to SVr4, POSIX.1-2001, 4.3BSD, C89. The other functions are from C99.

abs(3), ceil(3), cabs(3), floor(3), labs(3), rint(3)

2001-06-07

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