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LETTERfabsULETTER Returns the absolute value of a floating-point value.

Overview
#include <math.h>

r = fabs(x);

double r;
double x;

Portability
ANSI

Description
"fabs" computes the absolute value of the specified argument "x" which can be a floating-point number (float) or a double-precision floating-point number (point).

Returns
This function returns the absolute value of the specified argument as a double-precision floating-point number.

See also
abs