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LETTERfrexpULETTER Splits a floating-point value into mantissa and exponent.

Overview
#include <math.h>

r = frexp(x,expo);

double r;
double x;
int *expo;

Portability
ANSI

Description
"frexp" splits the floating-point value "x" into its mantissa and exponent parts. The exponent will be placed in the variable "expo" points to and is specified to a base of 2.

Returns
The mantissa as a double-precision floating-point value.