How can I break a while loop with the press of a key?

Asked Jun 02 '22 at 03:54

Active Jun 02 '22 at 04:14

Viewed 275 times

I want to write code using a while loop, but I want to break the loop when I press a key, and if I did not press a key then the loop continues. For example, in this code, I want the program to print natural numbers until I press a key.

How can I do that?

int main()
{
    int i= 1;
    while(true)
    {   
       cout<<i<<" ";
       i++;
    }
}

edited Jun 02 '22 at 04:12

Remy Lebeau

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asked Jun 02 '22 at 03:54

امیر مهدی هدایتی

if you are using visual studio, include conio.h, then use something like `if (_kbhit()) { _getche(); return 0; }` – AndersK Jun 02 '22 at 04:05
@Kitswas it doesn't, because that code pauses the loop while waiting for keyboard input. The OP doesn't want to pause the loop. – Remy Lebeau Jun 02 '22 at 04:16
@AndersK thank you , that code works but can you tell me how ? what is kbhit ? – امیر مهدی هدایتی Jun 02 '22 at 05:02
@Kitswas no because I dont want program wait for input. – امیر مهدی هدایتی Jun 02 '22 at 05:07
You can press Ctrl-C to interrupt a program. Then you do not have to change the code at all. – j6t Jun 02 '22 at 05:47
@j6t it was just example I was looking for a code to break the loop . – امیر مهدی هدایتی Jun 02 '22 at 05:51
The _kbhit checks the keyboard buffer after a character, the getche reads the character. So when the user presses a key, the character is entered into the keyboard buffer – AndersK Jun 02 '22 at 06:30

How can I break a while loop with the press of a key?

0 Answers0