Dear Student,
As the programming language is not mentioned so by default i have written the program in C++ language, if you need the program in any other language, please let me know.
Below i have written the complete C++.
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Program:
==================================================================
#include<iostream>
using namespace std;
//start of the main function
int main()
{
//variable declration
int num, fact = 1;
//validate that the input number is only positive number
do
{
cout<<"Enter a number: ";
cin>>num;
//if input number is negative throw a warning
if(num<0)
{
cout<<"Invalid input! please enter a positive number."<<endl;
}
}while(num<0);
int buf = num;
//if num is zero then factorial is 1
if(num == 0)
{
fact = 1;
}
//else find the factorial
else
{
while(num>0)
{
fact = fact * num;
num--;
}
}
//display the factorial
cout<<"Factorial of "<<buf<<" is = "<<fact<<endl;
return 0;
}
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Sample Output:
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Kindly Check and Verify Thanks...!!!
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