callback detail example
JavaScript
let add = function(a,b){
return a+b;
}
let multiply = function(a,b){
return a*b;
}
let calc = function(num1, num2, callback){
return callback(num1, num2);
};
let doWhatever = function(a,b){
console.log(`Here your two numbers ${a} and ${b}`);
};
console.log(calc(2,3,add));
console.log(calc(2,3,multiply));
console.log(calc(2,3,doWhatever));