How To Break an Infinite Loop with Key Press

     Hi! :) Today, we will discuss on how to break a while loop using any key press in C++. So, first of all, we need to include the iostream header file for the program to accept inputs from the keyboard.

         #include <iostream>

Here's the trick. Actually, I've read plenty ways on how to stop or break infinite loops or while loops in C++ and here is what I found that is the easiest and shortest. You can use the function _kbhit(). It is actually not a predefined function of C or C++ but is used by the Borland's family of compilers. It returns a non-zero integer if a key is in the keyboard buffer (Source: Cprogramming.com). So, we will be including the <conio.h> header file.

         #include <iostream>
         #include <conio.h>

The loop structure is up to you but here is mine. The loop will infinitely and endlessly loop until you enter any key.

         void main () {
                  while (!_kbhit()) {
                           std:: cout << "Press enter key to break 
                           loop :)" << std:: endl;  
                  } 
         }

That's it! You made it :) So, here's the whole code :)

         #include <iostream>
         #include <conio.h>

   
         void main () {
                  while (!_kbhit()) {
                           std:: cout << "Press enter key to break 
                           loop :)" << std:: endl;  
                  } 
         }

For Enter Key

         #include <iostream>
         #include <conio.h>

          void loop() {

                  while (!_kbhit()) {
                           std:: cout << "Press enter key to break 
                           loop :)" << std:: endl;  
                  } 
         }

         void main () {
                  char ch = 0;
                  while (ch != 13) {
                           loop();
                           ch = _getch();
                  } 
         }

Note: the _getch() gets the character you entered from _kbhit().