Java, scanner problem

Question

Hi, I am trying to run a code below

import java.util.Scanner;

public class Program
{
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
int amount = scanner.nextInt();
//your code goes here
for (i=1; i<=3; i++){
amount = amount * 0.9 ;
}
System.out.println("Your debt is " + amount );
}
}

But it gave a mistake

Line 0
Cannot resolve symbol

And that is code from exercise and have been written by content developer, not me.

and it is started somehow from line 1 (my guess line 0 is hidden from pupils)

Can somebody tell me what I am doing wrong? Thanks in advance

Answer 1

Антон Курганский

You didn't declare i

You cannot assign double value to int

and don't print anything except only value.

for (int i=1; i<=3; i++){
amount = amount * 90 / 100 ;
}
System.out.println( amount );

Answer 2

Okay, I understood, thank you for so fast answer, that was helpful!

Answer 3

Declare your i and change amount by variable i in the for loop and also close the scanner.

Answer 4

Thank you very much!

Question for future, debagger here doesn't point to line with mistake?

Answer 5

Антон Курганский

It gives just try to run again.

Answer 6

Yes ,code works fine now, but now I don't understand why it doesn't take something like

(double) amount = (double) amount * 0.9;
🤔

And question about debagger, why it pointed for me to "line 0", not like "line 9"?

Answer 7

Антон Курганский

You declared amount as int so (double) amount would be wrong. You need to assign it to another variable with double data type

double abc = (double) amount;
abc = (double) amount * 0.9;

So basically you need to take input as double if you want to solve like that.

About error that's the problem of Sololearn terminal. I think they put as alert so we get message like that.