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.
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;
}
Output
4.00 = 0.50 * 2^3
Syntax
double frexp(double x, int *e)
Parameter Values
| Value | Type | Explanation |
|---|---|---|
| x | Required | Specifies the value to be computed. |
| e | Required | Specifies the value of the exponent is to be stored. |
Return Value
| Value | Explanation |
|---|---|
| Number (double) | Returns the mantissa and the exponent of the given value. |
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