Javascript function declaration

example.js

// In this first example, I declare a function with what I call
// the 'standard' syntax, which is what I have taught. Because of
// this, I can make a call to the function before or after the declaration.

say_hello(); // logs 'hello world!'

function say_hello(){
  console.log('hello world!');
}

say_hello(); // logs 'hello world!'

// In the second example here, I create a function by assigning an
// anonymous function to a variable, then making a call on the variable.
// This will throw an error unless the variable was defined in the right order.

say_hello2(); // error: 'say_hello' is undefined

var say_hello2 = function(){
  console.log('hello world!');
}

say_hello2(); // logs 'hello world!'