What is setTimeout and setInterval in JavaScript?

setTimeout and setInterval are two functions in JavaScript that allow you to schedule a piece of code to be executed after a specified amount of time has passed.

setTimeout is a function that executes a function or specified piece of code only once after the specified time interval has passed. The syntax for using setTimeout is as follows:

setTimeout(function, delay);

Where function is the function to be executed after the specified time interval and delay is the time interval in milliseconds. For example:

setTimeout(function() {
  console.log("Hello, World!");
}, 3000); // This will log "Hello, World!" to the console after 3 seconds (3000 milliseconds).

setInterval is similar to setTimeout, but it executes the function repeatedly at the specified interval until clearInterval is called or the page is unloaded. The syntax for using setInterval is as follows:

setInterval(function, interval);

Where function is the function to be executed repeatedly and interval is the time interval in milliseconds. For example:

let intervalID = setInterval(function() {
  console.log("Hello, World!");
}, 3000); // This will log "Hello, World!" to the console every 3 seconds (3000 milliseconds).

// To stop the interval, you can call clearInterval as follows:
clearInterval(intervalID);

It is important to keep in mind that both setTimeout and setInterval are non-blocking, meaning they do not block further execution of the script while they are waiting for the time interval to pass.