Class Notes

Logical Operators
Negation !
   Tests if something is NOT TRUE.
   "Is it true that something is not...."



var loggedIn = false;
if (!loggedIn) {
      document.write("Log in Please");
}

Nesting
if (condition) {
    //do this
            if (condition B) {
               //do that
            }
}

Arrays

// Arrays are zero indexed.

<script type="text/javascript">
    var myMagicalList = ['Narnicorns', 'Chupacabra', 'Gelfling'];

    //another method - use the Array () function with keyword new
    var myMagicalListB = new Array ('Donkey Lips McGee', 'Azreal', 'Orko');

 document.write(myMagicalList);



 //determine the number of items in an array
 document.write('<p>Length of my list is: ' + myMagicalList.length + '</p>');

 myMagicalList[myMagicalList.length] = 'Fart Burger';
 document.write('<p>Length of my list is: ' + myMagicalList.length + '</p>');
</script>


//pop - remove off the end
//push - add to the end
//shift - take something off the top
//unshift  - add to the top


-----------------
Loop
For repetitious task

You have to do these 3 things:
1.  Set a counter (how many times am I going to repeat this task
2. Test a condition
3. Change the counter

while

 var myCounter = 1;
while (myCounter <= 10) {
   document.write("The number is " + myCounter + "<br>");
   myCounter++;


for
while + arrays
for + arrays

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