FREXP(3)

NAME
frexp, frexpf, frexpl - convert floating-point number to fractional and integral components

SYNOPSIS
#include <math.h>
double
frexp(double value, int *exp);
float
frexpf(float value, int *exp);
long double
frexpl(long double value, int *exp);

DESCRIPTION
The frexp() function breaks a floating-point number into a normalized fraction and an integral power of 2. It stores the integer in the int object pointed to by exp. The frexpf() function is a single precision version of frexp(). The frexpl() function is an extended precision version of frexp().

RETURN VALUES
The frexp(), frexpf() and frexpl() functions return the value x, such that x is a double with magnitude in the interval [1/2, 1) or zero, and value equals x times 2 raised to the power *exp. If value is zero, both parts of the result are zero.

SEE ALSO
ldexp(3), modf(3)

STANDARDS
The frexp() function conforms to ansiC.