Program to calculate the exponential series

Program:

#include<stdio.h>
#include<conio.h>
void main()
{
    int i, n, exp;
    float x, sum = 1, t = 1;
    clrscr();
    printf("Enter the value for x : ");
    scanf("%f", &x) ;
    printf("\nEnter the value for n : ");
    scanf("%d", &n);
    for(i = 1 ; i < n + 1 ; i++)
    {
        exp = i;
        t = t * x / exp;
        sum = sum + t;
    }
    printf("\nExponential Value of %f is : %8.4f", x, sum);
    getch();
}

Output:

Enter the value for x : 2
Enter the value for n : 20
Exponential Value of 2.000000 is : 7.3891