C frexp() Function

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C frexp()

The frexp() function returns the mantissa and the exponent of the given value.

The calculation for this function is: x = mantissa * 2 ^ exponent.

This function is defined in <math.h> header file.

Example

C Compiler
#include <stdio.h> #include <math.h> int main() { double x = 4, fraction; int e; fraction = frexp(x, &e); printf("%.2lf = %.2lf * 2^%d\n", x, fraction, e); return 0; }

Syntax

double frexp(double x, int *e)

Parameter Values

ValueTypeExplanation
x Required Specifies the value to be computed.
e Required Specifies the value of the exponent is to be stored.

Return Value

ValueExplanation
Number (double) Returns the mantissa and the exponent of the given value.

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