Skip to main content

Odd numbers in given range of values in java with example

Read this article to know how to find the ODD number in given range of values. The below example, we have taken two Integer values from where to where we need to find the ODD numbers.

In general, will identify the EVEN/ODD numbers by modulo(%) operator with 2. If the modulo returned value will be equal to 0 the given number is an EVEN number otherwise ODD number.
                   if (i % 2 == 1)

The above condition will be true when i value is an ODD number only. First will write the small program to find the number is EVEN/ODD in the given range of the values and the total count of EVEN and ODD numbers.

public class EvenOrAOdd {

    public static void main(String[] args) {
        
        int l=2,r=7,evenCount=0,oddCount=0;
        for(int i=l;i<=r;i++) {
            if(i%2==1) {
                System.out.println(i+" is ODD number");
                oddCount++;
            }else {
                System.out.println(i+" is EVEN number");
                evenCount++;
            }
        }
        System.out.println("Even Count: "+evenCount+", ODD Count: "+oddCount);
    }
}

In the below example, oddNumbers(int l, int r) will identify all the ODD numbers between the given range of values(l-left, r-right) and return it to the main() method as an array type.

public class OddNumbers {

    public static void main(String[] args) {
        int l = 2, r = 9;
        int[] ar = oddNumbers(l, r);
        for (int i = 0; i < ar.length; i++) {
            System.out.println(ar[i]);
        }
    }

    public static int[] oddNumbers(int l, int r) {
        int counter = 0;
        int length = (((r - l) / 2)%2==0)?(r - l) / 2:((r - l) / 2)+1;
        int[] oddAr = new int[length];

        for (int i = l; i <= r; i++) {
            if (i % 2 == 1) {
                if (counter == 0) {
                    oddAr[counter] = i;
                    counter++;
                } else {
                    oddAr[counter] = i;
                    counter++;
                }
            } 
        }
        return oddAr;
    }

}
This question is part of the online coding test website.
*. Array length we need to identify dynamically depending on the given input range.
*. Similarly, if you want to find EVEN numbers in the given range of the values, you change the condition from if (i % 2 == 1) to if (i % 2 == 0).
Labels:
Location: Bengaluru, Karnataka, India

Popular posts from this blog

JVM, JRE and JDK in Java

JVM, JRE and JDK are the most basic common concepts to know in java. These are the basic features to understand how Java architecture works? JVM stands for Java Virtual Machine, which doesn't have any physical directories created in java installation. JRE stands for Java Runtime Environment, which creates the directory under Java installation path and also present in JDK. JDK stands for Java Development Kit, which creates the directory in Java installation path and also it has it's own JRE. Since we have already learn that Java is platform independent means if we have implemented any of the java class in one environment, it will be executed in any other environment and provides the same output. But, JVM, JRE and JDK all are platform dependent . So that, for windows, linux, unix, mac, solaris..etc has it's own JVM, JRE and JDK. One will be not compatible with other environments. While installing the Java, we might come to know a bit about JRE and JDK. But, JVM is the other...
8 comments
Read more

Prime, Fibonacci and Factorial number with example in java

Prime number, Fibonacci series and Factorial number programs are most commonly asked questions in interview. Read this article to know what is and how to write programs for prime number, fibonacci series and factorial number. Prime Number: prime number is natural number greater than 1 that has no positive divisor other than 1 and itself. A natural number greater than 1 is not a prime number, is called Composite number . For example, 7 is a prime number. Because it can divide with 1 and 7 only. Where as 8 is composite number. Since it has the divisor 2 and 4 in addition to the 1 and 8. The below example represents the finding the passing number is prime number or not. If the passing number is prime number it will print true otherwise it will print false. package com . javatbrains . practice ; public class PrimeNumber { public boolean isPrimeNumber ( int number ) { if ( number <= 1 ) return false ; // There's only one ...
1 comment
Read more

How to insert images into database using JDBC?

How to insert images into database table by using JDBC? To know about these topic follow the below lines,           Before going to write a JDBC program for inserting images into database table, we need to create a specific table for inserting images column datatype. For creating the database table, execute the below command in MySQL command prompt. 1 2 3 4 CREATE TABLE ` images ` ( ` image_id ` int ( 11 ) NOT NULL AUTO_INCREMENT, ` image_flag ` int ( 11 ) NOT NULL , ` image ` longblob NOT NULL , PRIMARY KEY ( ` image_id ` ));           After executing the above query in MySQL command prompt, execute the below query to know weather the above table query is created or not. 1 Show tables;            When you have executed the above query that will show you the list of table which all exists in the current database. Current tab...
3 comments
Read more