# Write C|Java|C++|Python Program to compute 1/N!

## Write a C Program to compute 1/n!.

Problem statement:- Program to compute 1/n!

Data requirement:-

Input Data:- n
Output Data:-result

Program in C

Here is the source code of the C Program to compute 1/n!.

#include<stdio.h>//printf,scanf definition
int main()
{
int n,i,fact=1;
double result;

//Get the n value
printf("Enter the n value:");
scanf("%d",&n);

//Compute the n factorial
/*fact*=1
fact*=2
.
.
.
fact*=n
*/
for(i=1;i<=n;i++)
{

fact*=i;

}

//Compute the 1/n!
result=1.0/fact;

//Display the value of 1/n!
printf("1/n!=%lf\n",result);
}

Input/Output:
Enter the n value:5
1/n!=0.008333

## Write a C++ Program to compute 1/n!.

Program in C++

Here is the source code of the C++ Program to compute 1/n!.

#include<iostream>
using namespace std;
int main()
{
int n,i,fact=1;
double result;
cout<<"Enter the n value:";
cin>>n;
for(i=1;i<=n;i++)
{

fact*=i;

}
result=1.0/fact;
cout<<"1/n!= "<<result;
}

Input/Output:
Enter the n value:7
1/n!= 0.000198413

## Write a Java Program to compute 1/n!.

Program in Java

Here is the source code of the Java Program to compute 1/n!.

import java.util.Scanner;
public class P1 {

public static void main(String[] args) {
Scanner cs=new Scanner(System.in);
int n,i,fact=1;
double result;
System.out.println("Enter the n value:");
n=cs.nextInt();
for(i=1;i<=n;i++)
{

fact*=i;

}
result=1.0/fact;
System.out.println("1/n! = "+result);

cs.close();

}
}

Input/Output:
Enter the n value:
4
1/n! = 0.041666666666666664

## Write a Python Program to compute 1/n!.

Program in Python

Here is the source code of the Python Program to compute 1/n!.

n=int(input("Enter the n value:"))
fact=1
for i in range(1,n+1):
fact*=i
result=1.0/fact
print("1/n!= ",result)

Input/Output:
Enter the n value:5
1/n!=0.008333