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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. SEE ALSO
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

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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 | +-----------------------------+-----------------------------+ SEE ALSO
isnan(3M), ldexp(3M), modf(3M), attributes(5), standards(5) SunOS 5.10 16 Aug 2004 frexp(3M)

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