06b2_Loops

Eternal Loop

OK,Can I think of it this way: never have the second variable be a number less than the LH one.

Adding Strings Together and Concatenation

Two ways to join strings: first, using extrapolative string; second, using concatenation with literal-string break:

Echoing Arrays Using Loops 1.

We start with an indexed array. For ejemplo,

$myArray = array('cat' , 'dog' , 'bear' , 'peach' , 'twig');

Next, with our "For' conditional composed of 3 statements:

for (sets value ; compares value ; increments [to shut off])

{

Next, the action(s) to loop over and over;

}

Echoing Arrays Using Loops 2.

Counting an Array

I have to take the logic of what follows on faith; the bit about subtracting 1 from the 'count' function makes little sense to me and when stuff doesn't make sense, I don't remember well. Why is the array indexed to 0 in the first place, if this has to be done? "Whatever!" Just memorize it by rote, yes? "It will latyr be revealed!"

Do this exercise again.

Counting Arrays using Foreach Command

Again: Counting A Keyed Array Using 'Foreach' Command

Time out: ALL arrays are 'keyed' apparently. It's just that 'indexed' means the key is by default integers (starting with 0), and 'associative' means each value is paired with a preceding name that's nat an integer.

Foreach Command again: Associative Array

note how repeated keys are not counted again. also note that 'foreach' key and value elements seem to be nameable as anything. though it makes it clearer for later is they're just called names like '$key' and '$value'.

Foreach Command again: Associative Array

Adding values to the Array from outside of It (right wording?)--Indexed Array

Adding values from outside of the Array (right wording?)--Associative Array

one more time: counting out the assoc. array and adding more stuff from outside it