Why does the "variable already defined" error occur?

Question

Java

Write a program that prints the result for the expression 1 < a/10 || a < 2/3 + 1 for a values ​​of
123, 58, 0, -1, -0.443, 4, in turn. Run the program.

How can I make it so that a variable acan be assigned multiple values ​​in one block? If I start to override a, it says that the variable ais already defined in the method main. How to make this task in one block?

Answer 1

Why do you need to redefine a?
Do you really need something like:
boolean bResult = 1 < a / 10 || a < 2/3 + 1; ?