@c ----------------------------------------------------------------------
@node modfl, math
@subheading Syntax

@example
#include <math.h>

long double modf(long double x, long double *pint);
@end example

@subheading Description

@code{modfl} breaks down @var{x} into its integer portion (which it
stores in @var{*pint}) and the remaining fractional portion, which it
returns.

@subheading Return Value

The fractional portion.

@subheading Portability

@portability !ansi, !posix