# C# Program to Check Odd Number

You are Here:

## What are Odd Numbers?

An integer (never a fraction) that cannot be divided exactly by 2. For example, 3 is an odd number, i.e., 3 % 2 = 1 (not zero).

Note: % is a Modulus (Division Remainder) operator, it finds the remainder after division of one number by another. Please check our Arithmetic Operators for more details.

Tips: It is recommended to use our online Odd Numbers calculator for better understanding.

## Using For Loop

In the following example, we will find all the Odd Numbers between 10 and 25 using for loop.

### Example

C# Compiler
using System; namespace myApp { class Program { static void Main(string[] args) { int start = 10; int end = 25; Console.WriteLine("Odd numbers between {0} and {1}: ", start, end); for(start=start; start<=end; start++) { if(start % 2 != 0) Console.Write(start +" "); } } } }

### Output

Odd numbers between 10 and 25: 11 13 15 17 19 21 23 25

## Using While Loop

In the following example, we will find all the Odd Numbers between 10 and 25 using while loop.

### Example

C# Compiler
using System; namespace myApp { class Program { static void Main(string[] args) { int start = 10; int end = 25; Console.WriteLine("Odd numbers between {0} and {1}: ", start, end); while(start <= end) { if(start % 2 != 0) Console.Write(start +" "); start++; } } } }

### Output

Odd numbers between 10 and 25: 11 13 15 17 19 21 23 25

## Using do while Loop

In the following example, we will find all the Odd Numbers between 10 and 25 using do while loop.

### Example

C# Compiler
using System; namespace myApp { class Program { static void Main(string[] args) { int start = 10; int end = 25; Console.WriteLine("Odd numbers between {0} and {1}: ", start, end); do{ if(start % 2 != 0) Console.Write(start +" "); start++; }while(start <= end); } } }

### Output

Odd numbers between 10 and 25: 11 13 15 17 19 21 23 25

## Odd Numbers between any Given Range

In the following example, we will find all the Odd numbers between any given range.

### Example

C# Compiler
using System; namespace myApp { class Program { static void Main(string[] args) { Console.Write("Enter a (int) starting number: "); int start = Convert.ToInt32(Console.ReadLine()); Console.Write("Enter an (int) ending number: "); int end = Convert.ToInt32(Console.ReadLine()); Console.WriteLine("\nOdd numbers between {0} and {1}: ", start, end); for(start=start; start<=end; start++) { if(start % 2 != 0) Console.Write(start +" "); } } } }

### Output

Enter a (int) starting number: 2 Enter an (int) ending number: 10 Odd numbers between 2 and 10: 3 5 7 9

## Check Whether the Given Number is Odd or Even

In the following example, we will check whether the given number is an Odd number or Even number.

### Example

C# Compiler
using System; namespace myApp { class Program { static void Main(string[] args) { Console.Write("Enter a (int) number: "); int num = Convert.ToInt32(Console.ReadLine()); if(num % 2 == 0) Console.WriteLine("{0} is an even number", num); else Console.WriteLine("{0} is an odd number", num); } } }

### Output

Enter a (int) number: 25 25 is an odd number

## Reminder

Hi Developers, we almost covered 90% of String functions and Interview Question on C# with examples for quick and easy learning.

We are working to cover every Single Concept in C#.

Please do google search for:

## Join Our Channel

Join our telegram channel to get an instant update on depreciation and new features on HTML, CSS, JavaScript, jQuery, Node.js, PHP and Python.

This channel is primarily useful for Full Stack Web Developer.