## Linux and UNIX Man Pages

Test Your Knowledge in Computers #935
Difficulty: Medium
A fixed 32-bit data format for system time means that timestamps rolls over approximately every 136 years, with the first such occurrence on 7 February 2036.
True or False?

# frexp(3) [freebsd man page]

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

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

LIBRARY
Math Library (libm, -lm)

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

RETURN VALUES
These 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.

ldexp(3), math(3), modf(3)

STANDARDS
The frexp(), frexpf(), and frexpl() functions conform to ISO/IEC 9899:1999 (``ISO C99'').

BSD								   March 4, 2005							       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
c99 [ 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			   |
+-----------------------------+-----------------------------+