Help needed with the while loop

[lyle777]

Hi there
I need help with the while loop, ive just started learning about it and I do not understand it. I heard that if the condition is true, the statements executes until
it becomes false.

It would be nice if someone could write me a small and simple example code
that shows me how the while loop works.

I was having trouble understanding the following:

#include <iostream>
using namespace std;
int main()
{
    int length, width, num;
 
   cin >> num;
 
    while(num < 20) {
                  cout << "KKK ";
                  num++;
    }
    cin.get();
    cin.get();
    cin.get();
    return 0;
}

[Dheeraj Joshi]

Until the condition becomes false while loop will be executed.

In you example

cin >> num;
 
while(num < 20) {
cout << "KKK ";
num++;
}
 

if user inputs value less than 20 while loop will execute and it prints numbers from user input value till 19.

example: if user entered 15 then your program will print

15
16
17
18
19
 

if user has entered something greater than 20 or 20. Your program won't print anything.

Regards
Dheeraj Joshi