Description
Get a number from user for which you need to fin the factorial, then calculate the factorial and give it as the output.
Input
4
Output
24
C Program
#include <stdio.h>
int main ()
{
int num;
long fact = 1;
printf("Enter a number: ");
scanf("%d",&num);
if(num < 0)
printf("Invalid Input");
else
{
for(int i = 1; i <= num; i++)
fact = fact * i;
}
printf("Factorial is: %ld",fact);
}
C++ Program
#include<iostream>
using namespace std;
int main ()
{
int num;
long fact = 1;
cout<<"Enter a number: ";
cin>>num;
if(num < 0)
cout<<"Invalid Input";
else
{
for(int i = 1; i <= num; i++)
fact = fact * i;
}
cout<<"Factorial is: "<<fact;
}
Java
import java.util.Scanner;
public class Main
{
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Enter an Integer: ");
int num = sc.nextInt();
int fact = 1;
if(num < 0)
System.out.println("Invalid Input");
else
{
for(int i = 1; i <= num; i++)
fact = fact * i;
System.out.print("Factorial is "+fact);
}
}
}
Python
num= int(input("Enter a number "))
fact=1
if (num<0):
print("Invalid input")
else:
for i in range(1,num+1):
fact=fact*i
print("Factorial is ",fact)
