C frexp() Function

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C frexp() Function

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.


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; }


4.00 = 0.50 * 2^3


double frexp(double x, int *e)

Parameter Values

xRequiredSpecifies the value to be computed.
eRequiredSpecifies the value of the exponent is to be stored.

Return Value

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


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