C/math.h/exp

exp: returns the natural logarithm e raised to the arg power

<source lang="cpp">

//Declaration: float expf(float arg);

              double exp(double arg); 
              long double expl(long double arg);  

   
 
 #include <math.h>
 #include <stdio.h>
 int main(void)
 {
     printf("Value of e to the first: %f.", exp(1.0));

 }
        

/* Value of e to the first: 2.718282.*/

      </source>