ldexp
multiply by integer power of 2
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INTERFACE
#include <math.h>
double ldexp ( double x, int n ) long ldexpl ( long double x, int n ) float ldexpf ( float x, int n )
DESCRIPTION
The ldexp functions multiply x by 2 to the power of n.
Example 1
#include <stdio.h>
#include <math.h>
int main(void)
{
double x = 3.14, result = ldexp(x, 10);
printf("%.2lf * 2^10 = %.2lf\n", x, result);
return 0;
}Output:
3.14 * 2^10 = 3215.36SPECIAL VALUES
ldexp (±0, n) returns ±0.
ldexp (x, 0) returns x.
ldexp (±∞, n) returns ±∞.
SEE ALSO
STANDARDS
The ldexp functions conform to ISO/IEC 9899:1999(E).