Beginning Facebook Game Apps Development

Loops

Loops allow you to repeat steps until a specified condition is met. JavaScript has several different syntax for expressing the conditions of the loop, as well as explicit statements to jump out of the loop.

For Loop

A for loop repeats until a specified condition evaluates to false:

Listing 2–17. JavaScript for Loop

for(var i = 0; i < 10; i++) {   // do something 10 times }

While Loops

A while loop repeats until a specified condition evaluates to true:

Listing 2–18. JavaScript while Loop

i = 0; while( i < 5) {     i++; // do something 5 times }

Do/while

Similar to the while loop, this syntax places the logic to perform before the exit condition. You use this method to execute a loop before evaluating the condition, ensuring that the ...