Myvariable and my variable

Question

Why these are different?? Plz tell me someone

Answer 1

Myvariable -> capital M and no space in between
my variable -> two words
(well I don't think you can use two words as variable 🤔)

Clearly both are different

Answer 2

Can you please link your actual code?
Different variables names are different variables...
also, please tag the relevant programming language. Programming languages are usually case-sensitive.