Math.ceil();
Math.floor();
Math.sqrt();

// Array Length
arrayName.length 

// Push & POP

var myList = ["item1","item2","item3","item4"];

myList.push("item4"); // first
myList.unshift("item0"); // Last

var lastElement = myList.pop(); // first
var firstElement = myList.shift(); // last

// Splice & Slice

var list = [
  "saturday", // 0 = -7
  "sunday", // 1 = -6
  "monday", // 2 = -5
  "tuesday", // 3 = -4
  "wednesday", // 4 = -3
  "thursday", // 5 = -2
  "friday", // 6 = -1
];

var portion = list.slice(2, 5);
console.log(portion);

slice(startingIndex, afterEndingIndex)
splice(startingIndex, numberOfElement)

// shallow copy
// deep copy

// Marge Array - concat()

var list1 =[];
var list2 =[];
var list3 =[];

var list4 = list1.concate(list2);
var list = list1.concate(list2,list3);
var list = [].concate(list1,list2,list3);

// Array Sorting - Number

var list = [
  5,4,18,44,9,4,78,1,68,49,71,7,74
];

var length = list.length-1;

for(var i=0; i<length; i++) {
  for(var j=0; j<length; j++) {
    if(list[j] > list[j+1]) {
      [ list[j], list[j+1] ] = [ list[j+1], list[j] ];
    }
  }
}
console.log(list);

// Split and Join