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.
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
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