CODEWITHSUNDEEP
java
Sergio
Sergio

Reputation: 21

if statement dealing with boolean variable

I want my if statement to print out student or non student based on a boolean variable isStudent but I am not quite sure how it works. When I enter boolean isStudent it automatically initializes the variable false? And when I try to use isStudent == true nothing prints out but if I use isStudent == false it prints out student and non student. Can someone explain why it does that and if I did this right?

   public class Test {

public static void main(String[] args) {
        boolean isStudent = false;
            if(isStudent == false){
                System.out.println("Student");
                System.out.println("non-student");
            }
        }   
    }

Upvotes: 1

Views: 513

Answers (5)

Ronan
Ronan

Reputation: 613

what you are looking for is called an else statement it would look like this

 public class Test {   
public static void main(String[] args) {
        boolean isStudent = false;
            if(isStudent)
            {
                System.out.println("Student"); 
            }
            else
            {
                System.out.println("non-student");
            }
        }   
    }

heres another way without else since you asked but not a preferable way.you make a default string and declare it as a non student and it will only change if it is a student.

 public class Test {   
public static void main(String[] args) {
        boolean isStudent = false;
        String student = "non-student";
            if(isStudent)
            {
                student = "Student"; 
            }
            System.out.println(student);

        }   
    }

this might help if-else

Upvotes: 3

JP Moresmau
JP Moresmau

Reputation: 7393

When you have this code:

if(isStudent == false){
   System.out.println("Student");
   System.out.println("non-student");
}

Everything inside the curly braces { } is executed if the condition is true. You want an else statement

if (isStudent){
  System.out.println("Student");
} else {
  System.out.println("non-student");
}

Upvotes: 5

Mar-k
Mar-k

Reputation: 648

Also instead of using:

if(isStudent == false)

you could also do:

if(!isStudent)

Upvotes: 0

Bathsheba
Bathsheba

Reputation: 234635

isStudent == false is no more than a logical negation: it's equivalent to !isStudent.

The clearest way you can write what you want to do is

if (isStudent /* == true is implicit*/){
    System.out.println("Student");
} else /*all other possibilities*/{
    System.out.println("non-student");
}

Upvotes: 2

Jos
Jos

Reputation: 2013

After the below statement, the value of isStudent is false.

boolean isStudent = false;

In the next step you are checking if isStudent is equal to false.. which is true and the statements inside the block ({...}) will be executed, which prints the strings..

 if(isStudent == false){

Also, default value of boolean variable is false.

Upvotes: 1

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