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

INITIALIZER can declare and initialize multiple variables. STOP CONDITION is a single test (here it's just "i"), and INCREMENTER is an expression to be executed each time after body (the comma operator lets you have multiple sub-expressions, which all get executed. ). The body of the for loop is just the empty statement ";"