// C Efficient program to calculate e raise to the power x

#include <stdio.h>

  

// Returns approximate value of e^x using sum of first n terms of Taylor Series

float exponential(int n, float x)

{

    float sum = 1.0f; // initialize sum of series

  

    for (int i = n - 1; i > 0; --i )

        sum = 1 + x * sum / i;

  

    return sum;

}

  

// Driver program to test above function

int main()

{

    int n = 10;

    float x = 1.0f;

    printf("e^x = %f", exponential(n, x));

    return 0;

}

​