functions.js

/**
 * Functions
 *
 * Think of functions as reusabel code blocks.
 * The code inside is something that you want to call often.
 * And you can pass them a value.
 */

function renderComment(comment) {

  // hey there, jQuery, could you render this comment for me?

}


/**
 * Beside the input, there can also be an output value
 */
function doSomeCalculation(inputValue) {

  var output = inputValue * 12;

  return output;
}

var myResult = doSomeCalculation(3);
//console.log(myResult);

/**
 * Passing multiple parameters to a function
 */
function createSalutation(name, lastname, gender) {

  var salutation;

  if (gender == 'f') {
    salutation = 'Dear Mrs. ';
  } else {
    salutation = 'Dear Mr. ';
  }

  salutation += name + ' ' + lastname;

  return salutation;
}

/**
 * Local and global scope
 */

var globalVariable; // This variable exists outside and inside the function

function doSomething() {
  var localVariable; // This variable exists only in the function

}



/**
 * Self executing anonymous function
 */

(function (){

	console.log('Hello World');

})();