For Loop

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:

  1. for(condition; end condition; change){
  2.     // do it, do it now
  3. }

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

  1. for(var i = 0; i < 10; i = i + 1){
  2.     // do this code ten-times
  3. }

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.
{% initial %}
var message = “”;
{% solution %}
var message = “”;

for(var i = 0; i < 100; i++){
message = message + i;
}
{% validation %}
var message2 = “”

for(var i = 0; i < 100; i++){
message2 = message2 + i;
}
assert(message === message2);
{% endexercise %}