Java: Accept a number and check the number is even or not

Last update on April 27 2023 12:51:09 (UTC/GMT +8 hours)

Java Basic: Exercise-49 with Solution

Write a Java program to accept a number and check whether the number is even or not. Prints 1 if the number is even or 0 if odd.

Pictorial Presentation:

Java Basic Exercises: Accept a number and check the number is even or not

Sample Solution:

Java Code:

import java.util.*;
 public class Exercise49 {
     public static void main(String[] args){
	 Scanner in = new Scanner(System.in);
	 System.out.print("Input a number: ");
     int n = in.nextInt(); 
            if (n % 2 == 0) {
                System.out.println(1); 
               }
			else {
                System.out.println(0); 
              }
     }
}

Sample Output:

Input a number: 20                                                     
1

Flowchart:

Java Code Editor:

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Previous: Write a Java program to print the odd numbers from 1 to 99. Prints one number per line.
Next: Write a Java program to print numbers between 1 to 100 which are divisible by 3, 5 and by both.

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Java: Tips of the Day

Handling Null Pointer Exception

Null pointer exception is a runtime exception that is thrown when an application is trying to use an object reference with a null value.

String fruit;
spellChecker(fruit);

Here a null reference variable is passed as an argument of a method.

positionLocator(null);

In the above code snippet, null is directly passed to a function. In both these instances, there is a high possibility of throwing the NullPointerException.

This exception can be fixed by using the if-else condition.

public class NullPointerExceptionExample{
    public static void main(String args[]){
        String fruit = "apple";
        positionLocator(null);
}//Using an if-else condition
    static void positionLocator(String fruit){
        if(fruit != null){
           System.out.println("Second character: "+fruit.charAt(0));
        }
        else {
           System.out.println("NullPointerException thrown");
        }
    }}

Ref: https://bit.ly/3mi39Nr

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