Can anyone tell me the mistake here please?

Question

import java.util.Scanner;

public class Program
{
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
double amount = scanner.nextInt(); int resultado = (int) amount;
double mes = 1;
while( amount > 0 && mes < 7 && resultado > 0)
{
amount = amount * 0.9; ++mes; resultado = (int) amount;
}
System.out.println(resultado);
}
}

Answer 1

What is it your trying to achieve? seems to work ok if input is none decimal?

Answer 2

nextInt() accept only Integer values. So you enter decimal value then raise error.

Instead of these 2 lines,
double amount = scanner.nextInt();
int resultado = (int) amount;

you can write in single line like
int resultado= scanner.nextInt();

And next, resultado += 0.9;