Manual Pages  — MODF

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

LIBRARY SYNOPSIS DESCRIPTION RETURN VALUES SEE ALSO STANDARDS

Math Library (libm, -lm)

#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 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.

These functions return the signed fractional part of value.

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