In for loop how this second line works

Question

for (int x=0; x<3; x++){
amount = (int) (amount*90/100);
}
System.out.println(amount);

Answer 1

<amount> will be assigned 90% of its own value, converted as `int`.

What are you doing running that line in a loop though?

Answer 2

(int)(...) - converts to integer

Answer 3

The program mentioned above
I need to know where is the variable amount is declared and what is the initial value

If the initial value is 0
The final result is also 0

Answer 4

0 will be the out put naveen reddy