Question

Write a program that gets an integer value from the user. Then it finds and displays its factorial using the following approximation

Use the function pow(x,n) and exp(x) from math.h

3 f= n! = nn e n

Answer 1

The code is

#include<stdio.h>
#include <math.h>
int main() {
int n;
printf("Enter the value of N\n");
scanf("%d",&n);
double f =pow(n,n)*exp(-n)*sqrt((2*n+(1/3))*3.1415);
printf("The value of factorial is %lf",f);
}

The output is

Enter the value of N 6
The value of factorial is 710.067714

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