C ldexp() function

C ldexp() function - Load exponent of a floating-point number

Syntax:

double ldexp(double x, int exponent)

The ldexp() function is used to calculate the value of x * (2a^exp).

Parameters:

Return value from ldexp()

• returns the value of x * (2a^exp).

Example: ldexp() function

The following example shows the usage of ldexp() function.

#include <math.h>
#include <stdio.h>
 
int main(void)
{
   double x, y;
   int p;
 
   x = 3;
   p = 2;
   y = ldexp(x,p); 
   printf("%lf times 2 to the power of %d is %lf\n", x, p, y);
  
   x = 3;
   p = 3;
   y = ldexp(x,p); 
   printf("\n%lf times 2 to the power of %d is %lf\n", x, p, y);
   
   x = 1.5;
   p = 5;
   y = ldexp(x,p);
 
   printf("\n%lf times 2 to the power of %d is %lf\n", x, p, y);
}

Output:

3.000000 times 2 to the power of 2 is 12.000000

3.000000 times 2 to the power of 3 is 24.000000

1.500000 times 2 to the power of 5 is 48.000000

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