C/math.h/exp2
exp2: returns 2 raised to the arg power
//Header file: #include <math.h>
//Declaration: float exp2f(float arg);
double exp2(double arg);
long double exp2l(long double arg);
#include <math.h>
#include <stdio.h>
int main(void)
{
printf("Value of e to the first: %f.", exp2(1.0));
}
/*
Value of e to the first: 2.000000.*/