For

The easiest form of a loop is the for statement. This one has a syntax that is similar to an if statement, but with more options:

for(condition; end condition; change){
    // do it, do it now
}

Lets for example see how to execute the same code ten-times using a for loop:

for(var i = 0; i < 10; i = i + 1){
    // do this code ten-times
}

Note: i = i + 1 can be written i++.

Exercise

Using a for-loop, create a variable named message that equals the concatenation of integers (0, 1, 2, ...) from 0 to 99.

var message = "";