JSFiddle - React, Tailwind, and code Playground

by John Doe

JavaScript

outer:
for (var i = 0; i < 3; i++) {

  for (var j = 0; j < 3; j++) {
    
    var input = prompt("Значение в координатах " + i + "," + j, "");

    if (input == null) break outer; // (*)

  }
}
alert('Готово!');