Listing Odd Numbers Using C#
This tutorial explains how to list odd numbers using C# in a simple and beginner-friendly way. It is designed for students and learners who are new to programming and want to understand how odd numbers can be generated using basic C# logic.
By the end of this lesson, you will know how to generate odd numbers in C#, use loops effectively, and apply simple conditions to filter numbers.
What Are Odd Numbers? | Maths Explanation for C# Kids
Odd numbers are whole numbers that are not divisible by 2. Examples include 1, 3, 5, 7, and 9. In mathematics, an odd number always leaves a remainder of 1 when divided by 2.
Understanding odd numbers is an important part of primary mathematics, and C# provides a practical way to explore this concept using code.
How to Generate Odd Numbers in C#
To generate odd numbers in C#, we use a loop to go through a range of numbers and a condition to check whether each number is odd.
A number is considered odd if:
number % 2 !== 0
This condition checks whether the remainder after dividing by 2 is not zero.
C# Odd Number Program (Beginner Example)
The following example shows a simple C# odd number program. It lists odd numbers within a given range and displays them on the page.
This type of example is commonly used in C# beginner tutorials and helps students learn both maths concepts and programming basics at the same time.
Create a new C# Class file;
Call it OddNumbers.
Type out the adjoining C# code for listing odd numbers.
Code for Odd Number List with User Input in C#
For a little more flexibility, let's add an input form to our C# code for odd numbers.
All we need is a way to ask the user for input.
For this purpose, we'll use the Console.ReadLine()
C# library function.
Using a Loop to Display Odd Numbers in C#
A loop allows C# to repeat an action multiple times. In this case, the loop checks each number in a range and displays only the odd ones.
This approach demonstrates:
- How to use a loop in C#
- How to apply conditions
- How to list odd numbers with C# clearly and efficiently
It is an excellent example for learners studying C# maths code for the first time.
We have used a function here.
A function is a chunk of code that is executed when it is called upon,
such as when an event occurs.
Why Learn Odd Numbers with C#?
Learning how to work with odd numbers in C# helps students to:
- Understand number patterns
- Practice logical thinking
- Learn basic programming structures
- Combine primary maths with coding skills
This makes C# a useful tool for teaching and reinforcing mathematical concepts in an interactive way.
Who Is This C# Lesson For?
This C# lesson is suitable for:
- Primary school students
- Beginners learning C#
- Teachers looking for simple coding examples
- Anyone learning how to generate odd numbers in C#
No prior C# programming experience is required.
Key Takeaways from Listing Odd Numbers Using C#
- Odd numbers are numbers not divisible by 2
- C# can be used to generate and display odd numbers
- Loops and conditions are essential programming tools
- This tutorial provides a clear C# odd numbers tutorial for beginners
Summary: Listing Odd Numbers Using C#
Learning how to generate odd numbers in C# is a fun and practical way to combine math and coding. Whether you're a teacher, parent, or student, these C# tutorials for kids make programming approachable and engaging.
So! C# Fun Practice Exercise - List Odd Numbers
As a fun practice exercise, feel free to try out your own boundary values, and see how the C# code lists the odd numbers between those boundary values.
C# Code for Odd Numbers - Class FIle.
namespace Arithmetic
{
class OddNumbers
{
private int start; // Our starting point
private int stop; // where we will stop
private List<int> list_of_primes; // We will house our gathered prime numbers here.
// Our constructor
public OddNumbers(int first, int last)
{
start = first;
stop = last;
list_of_primes = new List<int>();
}
public List<int> prepResult()
{
/*
* Loop from start to stop and rip out even numbers;
*/
while (start <= stop)
{
if (start % 2 != 0)
{
list_of_primes.Add(start);
}
start++; // increase 'start' by 1
}
return list_of_primes;
}
}
}
C# Code for Odd Numbers - Main Class.
using System.Collections.Generic;
namespace Arithmetic
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Welcome to our demonstration sequels");
Console.WriteLine("Hope you enjoy (and follow) the lessons.");
Console.WriteLine("");
/* Use the Even Number class. */
int first = 1;
int last = 100;
List<int> answer;
OddNumbers odd_data = new OddNumbers(first, last); // odd numbers between 1 and 100
answer = odd_data.prepResult();
Console.WriteLine("Odd numbers between " + first + " and " + last + " are:");
Console.WriteLine(String.Join(", ", answer));
}
}
}
C# Code for Odd Numbers - Main class for Collecting Input.
using System.Collections.Generic;
namespace Arithmetic
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Welcome to our demonstration sequels");
Console.WriteLine("Hope you enjoy (and follow) the lessons.");
Console.WriteLine("\r\n");
/*
* Collect input.
*/
int first;
int last;
List<int> answer;
string collect_input; // For collecting user input
Console.Write("Enter your start number: ");
collect_input = Console.ReadLine();
first = int.Parse(collect_input); // Convert it to integer
Console.Write("Enter your stop number: ");
collect_input = Console.ReadLine();
last = int.Parse(collect_input);
// Use the Odd Number class.
OddNumbers odd_input = new OddNumbers(first, last);
answer = odd_input.prepResult();
Console.WriteLine("Odd numbers between " + first + " and " + last + " are:");
Console.WriteLine(String.Join(", ", answer));
}
}
}