grammatical edits for readability (#27617)

guide/english/javascript/tutorials/iterate-with-javascript-for-loops/index.md

@@ -14,10 +14,10 @@ ourArray will now contain [0,1,2,3,4]
 
     for(var i = 0; i < 5; i++) {  // There are 3 parts here
 
-There are three parts to for loop. They are separated by semicolons.
+A **for loop** is made up of three parts, each is separated by a semicolon:
 
 1.  The initialization: `var i = 0;` - This code runs only once at the start of the loop. It's usually used to declare the counter variable (with `var`) and initialize the counter (in this case it is set to 0).
 
 2.  The condition: `i < 5;` - The loop will run as long as this is `true`. That means that as soon as `i` is equal to 5, the loop will stop looping. Note that the inside of the loop will never see `i` as 5 because it will stop before then. If this condition is initially `false`, the loop will never execute.
 
-3.  The increment: `i++` - This code is run at the end of each loop. It's usually a simple increment (`++` operator), but can really be any mathematical transformation. It is used to move the counter (`i`) forward (or backwards, or whatever.
+3.  The increment: `i++` - This code is run at the end of each loop. It's usually a simple increment (`++` operator), but can really be any mathematical transformation. It is used to move the counter (`i`) forward (`++`), backwards (`--`), or some other form of incrementation.