JSFiddle - React, Tailwind, and code Playground

JavaScript

//the callback function
function done(){
	console.log("Done");
}

//the parent function 
function increment(num, callBack){
	for(var i = 0; i <= num; i++){
  	console.log(i);
  }
  return callBack();
}

//the callback function is passed to the increment function 
increment(10, done);