
Unity 4.x Game Development by Example: Beginner's Guide
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An iterative loop always starts with the for
keyword. It has three important sections:
Where to start
Where to end
What to do after every loop finishes
In this case, we start by declaring an iterator variable called i
of type int
(integer), and set that iterator i
to zero.
var i:int = 0
Next, we say that we're going to loop as long as the value of i
is less than (<
) the value of rows. Because we've already set rows to 4
, this code will loop four times.
i<rows
In the third section, we increase the value of i
by one. Here's how the interpreter chews through our loop:
Set an integer variable called i
to 0
.
Check to see if i
is less than rows
(4
). 0 is less than 4, so let's go!
Run the code inside the loop.
When we're finished, increase i
by one. (i++
). i
is now 1.
Check again to see if i
is less than rows
(4
). 1 is less than 4, so let's keep going.
Run the code inside the loop.
Repeat until we increase i
to 4 on the fourth loop.
Because i
is no longer less than rows
(4), stop repeating...
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