| FREXP(3) | Library Functions Manual | FREXP(3) |
frexp — convert
floating-point number to fractional and integral components
Math Library (libm, -lm)
#include
<math.h>
double
frexp(double
value, int
*exp);
float
frexpf(float
value, int
*exp);
long double
frexpl(long
double value, int
*exp);
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 frexp() function returns 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.
The frexp() function conforms to
ANSI X3.159-1989
(“ANSI C89”).
| September 10, 2015 | NetBSD 11.0 |