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MODF(3) Library Functions Manual MODF(3)

modf, modff, modflextract signed integral and fractional values from floating-point number

library “libm”

#include <math.h>

double
modf(double value, double *iptr);

float
modff(float value, float *iptr);

long double
modfl(long double value, long double *iptr);

The () function breaks the argument value into integral and fractional parts, each of which has the same sign as the argument. It stores the integral part as a in the object pointed to by iptr.

The modf() function returns the signed fractional part of value.

frexp(3), ldexp(3), math(3)

The modf() function conforms to ANSI X3.159-1989 (“ANSI C89”).

March 7, 2016 NetBSD-9.2