I'd express it as:
for(initialStatement; condition; postIterationStatement)
The initialStatement and postIterationStatement don't even need to be variable definitions, they could be function calls
Though only I'd say for a beginner not to worry about anything other than simple incrementing or decrementing for loops
But yeah, as someone already mentioned, dump functions will tell you a lot, as well as looking through other add-ons that do something with the variable to need
And don't edit out your post once one question is answered