Can somebody point me to where the whole i variable gets explained in detail? I've been going through all of the courses at w3schools starting from the beginning(HTML) and have made it all the way to XML, where I am now. I know in earlier sections they bring up examples like (i=x,i<x,i++) and stuff, but I just never fully understood where they are getting all that from. When I first came across it I just decided to accept it for what it was, hoping I would gain a greater understanding later on, but here I am at XML and I still don't understand fully the rules governing i and increments and such. Any help would be much appreciated.