Question

Lab 7. Boolean Expressions a) Write a program that evaluates the following expressions. Assign reasonable values to the variables. Print the results. a<b≥c , √a−7 b2 ≠c , d∨e∧f , a<b∨¬d ∧means and, ∨means inclusive or, ¬ means not. b) Write a program that asks a user whether he or she wants to become a Java programmer and determines if the user typed “yes” (Print true if yes and false otherwise.) Don't use the if
statement here

Answer 1

//Test java program for the expressions
//Lab7.java
public class Lab7
{
   public static void main(String[] args)
   {
       boolean result;
      
       int a=10;
       int b=20;
       int c=5;
      
       //Expression : a< b>=c
       //The above expression can be written as b>a && b>=c
      
       result= b>a && b>=c;
       System.out.println("a = "+a);
       System.out.println("b = "+b);
       System.out.println("c = "+c);
       System.out.println(" a< b>=c = "+result);
      
       //Expression : √a−7
       System.out.println("Sqrt of ( a−7) = "+Math.sqrt(a-7));
      
       //Expression :b2 ≠c
       result=!(b*b==c);
       System.out.println("b2 ≠c = "+result);
      
       boolean d=true;
       boolean e=true;
       boolean f=false;
      
       System.out.println("d = "+d);
       System.out.println("e = "+e);
       System.out.println("f = "+f);
      
       //Experssion : d∨e∧f
       result =d || e && f;
       System.out.println("d∨e∧f = "+result);
       //Expression : a<b∨¬d
       result =(a<b ) || !(d);
       System.out.println("a<b∨¬d = "+result);
      
   }
}

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Sample Output:

a = 10
b = 20
c = 5
a< b>=c = true
Sqrt of ( a−7) = 1.7320508075688772
b2 ≠c = true
d = true
e = true
f = false
d∨e∧f = true
a<b∨¬d = true

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//Exercise_1.java
import java.util.Scanner;
public class Exercise_1
{
   public static void main(String[] args)
   {
       Scanner console=new Scanner(System.in);
       //prompt for user input
       System.out.println("Do you want to become a java developer ?");
       String response=console.nextLine();
      
       //Using ternary operator
       //result =expression ? statement1 : statement2
       //statement1 is executed if expression is true
       //otherwise statement2 will be executed.
      
       //checking if response is yes then
       boolean result=response.equalsIgnoreCase("yes")?true:false;
       System.out.println(result);
      
   }

}

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Sample Output:

Do you want to become a java developer?
yes
true