# C# Program - Check whether a Number is Even or Odd

A number is known as an even number if it is a natural number and divisible by $2$. On the other hand, an odd number is a natural number which not divisible by $2$. Examples:

• Even Number: $-10, -4, 0, 6, 18, 50$
• Odd Number: $-11, -5, -1, 9, 21, 99$

### Example: Using conditional statements

In the below example, the number called MyNum is checked for even number by dividing it by $2$ and checking the remainder. For even number, the remainder is $0$ and for odd number, the remainder is $1$.

using System;

namespace MyApplication {
class MyProgram {
static void Main(string[] args) {
int MyNum = 17;
if (MyNum % 2 == 0){
Console.Write(MyNum + " is an even number.");
} else if (MyNum % 2 == 1) {
Console.Write(MyNum + " is an odd number.");
}
}
}
}


Output

17 is an odd number.


### Example: Using function

In the below example, a function called CheckEven() is created which takes a number as argument and checks it for even number.

using System;

namespace MyApplication {
class MyProgram {
static void CheckEven(int MyNum)
{
if (MyNum % 2 == 0){
Console.Write(MyNum + " is an even number.");
} else if (MyNum % 2 == 1) {
Console.Write(MyNum + " is an odd number.");
}
}

static void Main(string[] args) {
CheckEven(42);
}
}
}


Output

42 is an even number.


### Example: Using bitwise operators

When bitwise operator is used, the last bit of the given number is checked. If the last bit is $1$, the number will be odd and if the last bit is $0$, the number will be even.

Even Number:  50 ->    110010
& 000001
---------
000000

Odd Number:   99 ->   1100011
& 0000001
---------
0000001


using System;

namespace MyApplication {
class MyProgram {
static void CheckEven(int MyNum)
{
if ((MyNum & 1) == 1){
Console.WriteLine(MyNum + " is an odd number.");
} else {
Console.WriteLine(MyNum + " is an even number.");
}
}

static void Main(string[] args) {
CheckEven(50);
CheckEven(99);
}
}
}


Output

50 is an even number.
99 is an odd number.