[Solved] Input number in java input console

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To print something in java, you need to actually call the function that would print to the standard output.
In other words, you need to use System.out.print(What_you_want_to_print)

To see the output for your code, you need to adjust your code as follows:

import java.io.*;  
    public class Solution {
        public static void main(String[] args) throws Exception {
            BufferedReader reader = new BufferedReader(new         
            InputStreamReader(System.in));
            String snumber = reader.readLine();
            int number = Integer.parseInt(snumber);
            if (number > 0)
              number = number * 2;
            else
              number = number + 1;
            System.out.println(number);
        }
    }

solved Input number in java input console