Question

The factorial of a nonnegative n written as n! is defined as follows: n!= n*(n-1)*(n-2) * .... *1 (for all values of n greater than 0) and 0! =1. For example 5! = 5*4*3*2*1 which is 120. (can also be 1*2*3*4*5)

Write a C++ program that reads a nonnegative integer and computes and prints its factorial.

Answer 1

Program:

#include <iostream>

using namespace std;

int main()
{
int num,fact=1,i ;
char *process;
  
cout<<"Enter a non-negative number: ";
cin>>num;
if(num>0)
{
for(i=num;i>=1;i--)
{
fact=fact*i;
}
cout<<"Factorial of the "<<num<<" is "<<fact;
}
else
{
cout<<"Please enter a non-negative(positive) number!!";
}
return 0;
}

Output: