// purpose: demonstrate relational operators

import java.util.*;

public class Relations {

    // main(): program starting point
    public static void main( String[] args ) {

        // set up input scanner
        Scanner input = new Scanner( System.in );

        // get two numbers from user
        System.out.print( "Enter number: " );
        double a = input.nextDouble();

        System.out.print( "Enter number: " );
        double b = input.nextDouble();

        // compare and record values
        boolean b1 = ( a < b );     // *****  < is less than
        boolean b2 = ( a > b );     // *****  > is greater than

        boolean b3 = ( a <= b );    // ***** <= is less than or equal to
        boolean b4 = ( a >= b );    // ***** >= is greater than or equal to

        boolean b5 = ( a == b );    // ***** == is equals
        boolean b6 = ( a != b );    // ***** != is not equals

        // display results
        System.out.println();

        System.out.println( "When a = " + a + " and b = " + b );

        System.out.println( "   a < b  : " + b1 );
        System.out.println( "   a > b  : " + b2 );

        System.out.println( "   a <= b : " + b3 );
        System.out.println( "   a >= b : " + b4 );

        System.out.println( "   a == b : " + b5 );
        System.out.println( "   a != b : " + b6 );

        // warning on comparing decimal values for equality and inequality

        a = 1.0;
        b = 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1;

        boolean b7 = ( a == b );
        boolean b8 = ( a != b );

        System.out.println();

        System.out.println( "When a = " + a + " and b = " + b );
        System.out.println( "   a == b : " + b7 );
        System.out.println( "   a != b : " + b8 );
    }
}