NAME

modf, modff, modfl — extract signed integral and fractional values from floating-point number

LIBRARY

Math Library (libm, -lm)

SYNOPSIS

#include <math.h>

double
modf(double value, double *iptr);

float
modff(float value, float *iptr);

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

DESCRIPTION

The modf(), modff(), and modfl() functions break 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 floating point number in the object pointed to by iptr.

RETURN VALUES

These functions return the signed fractional part of value.

SEE ALSO

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

STANDARDS

The modf(), modff(), and modfl() functions conform to ISO/IEC 9899:1999 (“ISO C99”).