Factorial using Goto Statement in C++

This program calculates the factorial of a given number using a loop and a goto statement. The long int data type is used to accommodate large values of factorial.

Here's how the program works:

It prompts the user to enter a number.
It reads the number into the variable a.
It initializes a variable n to 1, which will be used to store the factorial value.
It uses a goto statement to create a loop that multiplies n by a and decrements a until a becomes 0.
The loop exits when a is not greater than 0.
The program outputs the final value of n, which represents the factorial of the input number.

While this program works correctly, using a goto statement is generally not considered good programming practice because it can make the code difficult to read and maintain. A better alternative would be to use a for or while loop to calculate the factorial.

Source Code

#include<iostream>
using namespace std;
int main()
{
    long int a,n=1;
    cout<<"\nEnter the number :";
    cin>>a;
    start:
    n=n*a;
    a--;
    if(a>0)
    {
            goto start;
    }
    cout<<"\nThe Total value is :"<<n;
    return 0;
}

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Output

Enter the number :5
The Total value is :120

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