In this article, we will learn about **code** and **algorithm** to check whether a **Number** is **Even** or **Odd** in **go** **golang**.Â

There are many ways to check whether a **Number** is **Even** or **Odd** in **go** **golang** which are given below:

**1:) **

**Algorithm**:

- Get the number as input from user
- Do modulus by 2 of that number
- If modulus by 2 of number is zero then it is even number otherwise odd number.

**Example with** **Code**:

package main import "fmt" func main(){ fmt.Print("Enter number : ") var n int fmt.Scanln(&n) if ( n % 2 == 0 ) { fmt.Println(n, "is Even number") }else{ fmt.Println(n, "is Odd number") } }

**2:)**

**Algorithm:**

- Get the number as input from userÂ
- Do bitwise and operator (&) between number and 1 (eg. number & 1)
- IfÂ the result of bitwise and operator (&) between number and 1 is zero then it is even number otherwise odd number.

**Example:**

Number = 10

/* Do bitwise and operator (&) between 10 and 1 to get to know whether 10 is even or odd number */

10 & 1

Binary of 10 is 1010

Binary of 1 is 1

1010 & 0001 = 0 (Result is zero, So 10 is even number)

Â Â Â Â Â Â Â Â Â Â Â

/* Do bitwise and operator (&) between 11 and 1 to get to know whether 11 is even or odd number */

Number = 11

11 & 1

Binary of 11 is 1011

Binary of 1 is 1

1011 & 0001 = 1 (Result is one, So 11 is odd number)

**Code:**

package main import "fmt" func main(){ fmt.Print("Enter number : ") var n int fmt.Scanln(&n) if (n & 1 == 1) { fmt.Println(n,"is Odd number") } else { fmt.Println(n,"is Even number") } }

**Output**:

Enter number : 13

13 is Odd number

Enter number : 10

10 is Even number

References:

https://en.wikipedia.org/wiki/Parity_(mathematics)

https://brilliant.org/wiki/even-and-odd-numbers/

To learn more about go golang, please follow given below link:

https://www.techieindoor.com/go-lang-tutorial/