Question

In what order will the numbers 1-4 be logged to the console when the code below is executed? Why?

(function() {
(1);
setTimeout(function(){ (2)}, 1000);
setTimeout(function(){ (3)}, 0);
(4);
})();

Answer 1

The numbers will be logged in the order: 1, 4, 3, 2

Step-by-step explanation:

The numbers 1-4 will be logged to the console in the following order: 1, 4, 3, 2.

This is because the code is using setTimeout() function to delay the execution of certain blocks of code. The number 1 is logged immediately. The number 4 is logged next since it is not delayed. The number 3 is logged after a delay of 0 milliseconds, but it still needs to wait for the current execution to finish before being logged. Finally, the number 2 is logged after a delay of 1000 milliseconds.

In summary, even though the delay for number 3 is 0 milliseconds, it still needs to wait for the current execution to finish before being logged.