Git branch is not working as I am expecting

Question

Okay so I am new to using git..and I thought I understood the concept of branching, but now I am confused.

Lets say I have a master.

I create a branch called bra

Answer 1

Since I didn't commit my changes on branch1, I am expecting my branch2 will not have branch1 codes

Working copy (staged + unstaged changes) is the same for all branches. And what you see is not the branch1 changes, but the working copy changes.

Once you commit your changes in branch1, you'll no longer see them in branch2 or any other branch.