ex29

Write a program  to calculate the factorial of an integer entered by the user. For example N = 7  the factorial of  7 equal to   1* 2 * 3 * 4 * 5 * 6 * 7 = 5040. 

******** In Algorithm ********

Algorithm Variables i,F,N: integers Begin F ← 1 write("Enter a positive integer :")

read (N) for i from 1 to N F ← F * i next write("the factorial of",N,"is:" F) End Result ===> Enter a positive integer : 6 the factorial of 6 is : 720

 

******** In C ********

#include <stdio.h> int main(){ int N,F=1,i; printf("Enter a positive integer:"); scanf("%d",&N); for(i=1;i<=N;i++) F = F * i ; printf("the factorial of %d is: %d",N,F); return 0; }

******** In C++ ********

#include <iostream> using namespace std; int main(){ int N, F=1, i ; cout<<"Enter a positive integer :" ; cin>>N; for(i=1 ; i<=N ; i++) F = F * i ; cout<<"the factorial of"<<N<<"is"<<F ; return 0; }

******** In JAVA ********

import java.util.Scanner;
class Main {
public static void main(String[] args){
int i,F=1,N;
Scanner sc = new Scanner (System.in);
System.out.print("Enter N:");
  N = sc.nextInt();
   for(i=1;i<=N;i++)
      F = F * i;  
   System.out.print("the factorial of"+N+" est "+F);
}
}

********  In C# ********

using System;
public class Ex29 {
public static void Main(string[] args)
{ int i,F=1,N;
Console.Write("Enter N:");
N=int.Parse(System.Console.ReadLine());
   for(i=1;i<=N;i++)
      F = F * i; 
   Console.Write("the factorial of"+N+" est "+F);
}
}