Question

Write a program to calculate the factorial value of the input number n! use the incrementation formula (i++) for your solution instead of decrementation formula (1--).
Sample input/output dialogue:
Enter a Number: 4
Factorial value: 24
(The computation is: 1*2*3*4=24)

Answer 1

#include <iostream>
using namespace std;
//main method
int main()
{
int Number;//variable for input number
int Factorial=1;//variable for result
//promt user to enter Number
cout<<"Enter a Number: ";
//read number
cin>>Number;
for(int i=1;i<=Number;i++){
Factorial*=i;
}
//show result
cout<<"Factorial value: "<<Factorial<<"\n";
//delay
system("pause");
//exit program
return 0;
}