Clarified what is going on inside a for-loop

jpdamon · jpdamon · commit 0b5fe1a187da · 2016-01-06T13:22:17.000-05:00
Response to workshopper#54
diff --git a/problems/for-loop/problem.md b/problems/for-loop/problem.md
@@ -1,4 +1,4 @@
-For loops look like this:
+For loops allow you to repeatedly run a block of code a certain number of times. This for loop logs to the console ten times:
 
 ```js
 for (var i = 0; i < 10; i++) {
@@ -7,12 +7,11 @@ for (var i = 0; i < 10; i++) {
 }
 ```
 
-The variable `i` is used to track how many times the loop has run.
+The first part, `var i = 0`, is run once at the beginning of the loop. The variable `i` is used to track how many times the loop has run.
 
-The statement `i < 10;` indicates the limit of the loop.
-It will continue to loop if `i` is less than `10`.
+The second part, `i < 10`, is checked at the beginning of every loop iteration before running the code inside the loop. If the statement is true, the code inside the loop is executed. If it is false, then the loop is complete. The statement `i < 10;` indicates that the loop will continue as long as `i` is less than `10`.
 
-The statement `i++` increases the variable `i` by 1 each loop.
+The final part, `i++`, is executed at the end of every loop. This increases the variable `i` by 1 after each loop. Once `i` reaches `10`, the loop will exit.
 
 ## The challenge:
 
