I can't understand the error

Question

https://code.sololearn.com/ce9ya6gNtiVg/?ref=app
https://code.sololearn.com/ce9ya6gNtiVg/?ref=app

Answer 1

You try to access a variable of a different scope, try declaring it in the upper scope...

(The scanner)

Answer 2

You did something like:

{
//var "s" exists in this scope
}
{
//different scope, "s" does not exist here
}

Can't give Java-specific solution.

Answer 3

can you please tell me in details