Using BufferedReader to read input number from user

   

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {

  public static void main(String[] args) throws Exception {
    BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
    String input = reader.readLine();

    double number = Double.parseDouble(input);

    System.out.println(input + ":" + Math.sqrt(number));

    reader.close();
  }
}

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Using BufferedReader to read input number from user : BufferedReader « File Input Output « Java

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