Scope of variables in “for” loop

Question

What I have known so far is, multiple declarations inside a block produce an error message and also uninitialized local variable gives garbage value on printing.

But

Answer 1

A block is anything in curly braces. A block doesn't have to follow a for do, while, if, etc. Literally any set of statements can be enclosed in their own block scope using curly braces.

The i in the for loop is not in the loop body scope since it is outside the curly braces. The i in the block is indeed uninitialized and contains garbage. Garbage usually just means "whatever was there before". As often as not, that value will be zero. That doesn't make it any less garbage.