For Loop

• If you know ahead of time, or can calculate ahead of time, how many iterations the loop will execute, it is often best to use a for loop.
• The for loop takes three arguments: the initialization, the condition, and the increment.
• Initialization is often used to initialize a counter variable.
• The condition is often used to compare that counter variable to another value.  When this condition is true, the loop executes for another iteration.  When false, it exits.
• The increment often changes the value of the counter variable.  Usually, it increments it by 1, but you can certainly change it by another value if you wish.
• Since you know the size of an array ahead of time, the for loop is often used to iterate through arrays.

for (int i = 0; i < array.length; i++) {
    System.out.println(array[i]);
}
• Imagine sending a message to five computers.  The IP addrsses of these computers can be held in an array.  Then, you can use a for loop to iterate through each IP address and send an appropriate message.


 Infinite Loops, Break, Continue
 
 

Created by:  Brandan Jones January 4, 2002