Regarding JavaScript for() loop voodoo

Question

I was for quite some time under the impression that a for loop could exist solely in the following format:

for (INITIALIZER; STOP CONDITION         


        

Answer 1

Syntax of for loop is:

for (pre-block; condition; post-loop-block)
    loop-block;

First, pre-block is executed, various variables are defined.

In each loop:

1. check condition
2. execute loop-block
3. execute post-loop-block
4. repeat from 1.