//CLASS EXAMPLES FROM NOVEMBER 5, 2014



//EXAMPLE 1
list = new Array(19, 7, 25, 60, 40, 12);
list[0]
//TRY 
//  list[1]
//  list[2]
//  list[3] > 20
//  list[4] + 1
//  list[4+1]
//  list.length
//        TRY CHANGING THE LENGTH
//
//HOW DO YOU GET IT TO TELL (always) YOU THE LAST NUMBER?


//EXAMPLE 2
names = new Array("Tom", "Seymour", "Bob", "Alice", "Ted");
names[0]
//TRY OTHERS
//   TRY
//      names.length
//      names[0].length
//
// HOW DO I GET IT TO VISIT EACH NAME AND SAY
//      Tom is great! Seymour is great! ... Ted is great!
// This should work REGARDLESS of how many names I have
//
// HOW DO I GET IT TO COUNT HOW MANY NAMES HAVE LENGTH 3?


i = 0;
count = 0;
while (i < names.length) {
  alert(names[i] + " is great!"); //say that for current name
  if (names[i].length == 3) //count how many have length 3
     count++;
  i++;  //move right ... to next name 
}
alert("There were " + count + " names of length 3");


//BACK TO EXAMPLE 1
list = new Array(19, 7, 25, 60, 40, 12);

//WE WANT TO WRITE A PROGRAM THAT SUMS THE NUMBERS
//AND REPORTS THE SUM AT THE END WITH AN ALERT

//HOW DO WE REPORT THE AVERAGE INSTEAD?
//This must work regardless of how many numbers we have!


i = 0;
sum = 0;

while (i < list.length) {
   sum += list[i];  // increase sum by current list item
   i++;  //move right ... to next number 
}

alert("The sum is " + sum);
alert("The average is " + sum/list.length);