import java.io.*;

// javac few_operators.java
public class few_operators
{
public static void main(String args[])throws IOException
{
/*this is a comment
compile as
javac multi_comment.java
call as java simple_comment */
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

System.out.print("Type numbers only: ");
String str = "";
str = br.readLine();
//System.out.println(str);
double d1 = Double.parseDouble(str);
d1 += 1;
System.out.println(" += operator : " + d1);
d1--;
System.out.println("-- operator : " + d1);
d1++;
System.out.println("Increment operator : " + d1);
d1 -= d1;
System.out.println(" -= operator : " + d1);
boolean easy= true;
System.out.println(" boolean operator : " + easy); // false
System.out.println(" boolean operator ! : " + !easy); // true

}
}