W3School TIY Editor

public class Main {

  public static void main(String[] args) {

    System.out.println(Math.log(6));

    System.out.println(Math.log(Math.E));

    System.out.println(Math.log(2));

    System.out.println(Math.log(1));

    System.out.println(Math.log(0));

    System.out.println(Math.log(-1));

  }

}

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