robot code ???

[TyLEr71]

what is a robot code and what does it do

[h3ro]

Building a robot is a lot of problem solving, so you should learn to do some research before you ask questions.

There is nothing wrong with questions, but the ones you have posted is already answered in the tutorial...

[Steve Joblin]

A robot usually has some type of microcontroller that is "programmed" to manage sensors and actuators.  This "program" is sometimes called "code", much like a computer program is sometimes called "code".