how to make a function in javascirpt code example

Example 1: simple javascript function

function idk() {
	alert('This is an alert!')
}
//call the function to make the function run by saying "Name of function + ()"
idk()

Example 2: javascript functions

function sayHelloTo(to) {
  alert(`Hello ${to}`);
}
sayHelloTo('World from Grepper')