Question

Write an application that estimates the value of the mathematical constant e by using the following formula. Allow the user to enter the number of terms to calculate.

e= 1 + 1/1! + 1/2! + 1/3! + ...

Answer 1

int input = Convert.ToInt32(Console.ReadLine());
double result = 1;
for(int i = 1; i <= input; i++){
int fact = 1;
for (int j = 2; j <= i; j++)
fact *= i;
result += 1.0/fact;
}

Console.WriteLine(result);