The for loop is a looping construct in JavaScript that are more simplistic than the while loop. When writing the for loop there are three three parts they are
- Initialize - a count variable is initialize, it's usually zero but it doesn't have to be
- Test - A test to see if the loop should continue
- Increment - finally the count is incremented, it doesn't have to be an increment it could be decrements as well
Let's use the JavaScript code to demonstrate:
If you execute the loop below you will bet a for loop that executes when i is less than 10
for (var i = 0; i < 10; i++)
{
console.log("i is " + i);
}
console.log("i outside of for look is " + i);
Here is the output:
Noticed the number outside of the loop is bigger than the number that's inside the loop on the last execution. Just keep that in mind when you are working with a for loop. If you want to execute on the tenth loop you have to change your test condition to say i <= 10. This implies that i has to be less than or equal to 10 before the loop stops executing
Here is the output:
Although the value outside of the loop is now 11!
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