Exercise 1.3: Callbacks
Level 1
Exercise 1: Function process with a number and a callback. It should call the callback with the number.
Exercise 2: Function calculator with two numbers and a callback. It should perform an operation (sum) using the callback.
Level 2
Exercise 3: Function waitAndGreet that waits 2 seconds before calling the callback with the name.
Exercise 4: Function processElements that receives an array and a callback, and applies the callback to each element.
Level 3
Exercise 5: Function processString that converts a string to uppercase and passes the result to a callback.
⚠️ Important: Open the browser console (F12 or Ctrl+Shift+I) to see the results of the exercises and verify that they work correctly.