# frexp(3) [osx man page]

```FREXP(3)						   BSD Library Functions Manual 						  FREXP(3)

NAME
frexp -- break floating-point number into normalized fraction and power of 2

SYNOPSIS
#include <math.h>

double
frexp(double value, int *exp);

long double
frexpl(long double value, int *exp);

float
frexpf(float value, int *exp);

DESCRIPTION
The frexp() functions break the floating-point number value into a normalized fraction and an integral power of 2. They store the integer in
the int object pointed to by exp.

The functions return a number x such that x has a magnitude in the interval [1/2, 1) or 0, and value = x*(2**exp).

SPECIAL VALUES
frexp(+-0, exp) returns +-0, and stores 0 in the object pointed to by exp.

frexp(+-infinity, exp) returns +-infinity, and stores an unspecified value in the object pointed to by exp.

frexp(Nan, exp) returns a Nan, and stores an unspecified value in the object pointed to by exp.

math(3), scalbn

STANDARDS
The frexp() functions conform to ISO/IEC 9899:2011.

BSD								 December 11, 2006							       BSD```

## Check Out this Related Man Page

```frexp(3M)						  Mathematical Library Functions						 frexp(3M)

NAME
frexp, frexpf, frexpl - extract mantissa and exponent from a floating-point number

SYNOPSIS
cc [ flag... ] file... -lm [ library... ]
#include <math.h>

double frexp(double num, int *exp);

float frexpf(float num, int *exp);

long double frexpl(long double num, int *exp);

DESCRIPTION
These functions break a floating-point number into a normalized fraction and an integral power of 2. They store the integer exponent in the
int object pointed to by exp.

RETURN VALUES
For finite arguments, these functions return the value x, such that x is a double with magnitude in the interval [1/2, 1)  or  0,  and  num
equals x times 2 raised to the power *exp.

If num is NaN, NaN is returned and the value of *exp is unspecified.

If num is +- 0, +- 0 is returned and the value of *exp is 0.

If num is +-Inf, num is returned and the value of *exp is unspecified.

ATTRIBUTES
See attributes(5) for descriptions of the following attributes:

+-----------------------------+-----------------------------+
|      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
+-----------------------------+-----------------------------+
|Interface Stability	     |Standard			   |
+-----------------------------+-----------------------------+
|MT-Level		     |MT-Safe			   |
+-----------------------------+-----------------------------+