/*
* LOOPS:
* 0. Loops allow us to excecute a block of code as many time as needed. Loops are useful for repeating a piece of code over and over again.
*/

//For Loops//
for(var i = 0; i < 11; i++) {  //Declaration, Conditional, Action to execute after each loop
  console.log(i);
}

//While Loops//
var i = 0;
while(i < 11) {       //Conditional
  console.log(i);
  i++;                //Action to execute after each loop
}

//Looping over an array//
var students = ['Kevin', 'Tom', 'Jim'];
for(var i = 0; i < students.length; i++) {
    console.log(students[i]);
  }

//Looping over an array in reverse//
for(var i = students.length - 1; i > -1; i--) {
    console.log(students[i]);
  }

//For In Loops: Useful for looping over an object//
var car = {
  make: 'Ford',
  year: 2015,
  color: 'black'
};
for(var key in car) {
  console.log(car[key]);
}

//Looping over object's values//
var keys = Object.keys(car);
  for(var i = 0; i < Object.keys(car).length; i++) {
    console.log(keys[i]);
  }

//Looping over object's values in reverse//
var keys = Object.keys(car);
  for(var i = Object.keys(car).length - 1; i > -1; i--) {
    console.log(keys[i]);
  }