unsigned int and unsigned long : unsigned int « Data Types « C++ Tutorial

#include <iostream>   
using namespace std;   
  
int main() {   
   unsigned int numb;   
   unsigned long fact=1;     
  
   cout << "Enter a number: ";   
   cin >> numb;         
  
   for(int j=numb; j>0; j--) 
   fact *= j;           
   cout << "Factorial is " << fact << endl;   
   return 0;   
}

2.16.unsigned int
	2.16.1.	unsigned int and unsigned long
	2.16.2.	Demonstrates arithmetic operations with unsigned int variables
	2.16.3.	cin Handles unsigned int Data Types
	2.16.4.	unsigned int: Subtraction and Integer Overflow
	2.16.5.	Tests signed and unsigned integers
	2.16.6.	Difference between signed and unsigned integers