Check if a given Number is Even or Odd

Given a positive integer N, the task is to check whether the given number N is Even or Odd.

Examples:

Input : N = 10
Output : Even

Input : N = 5
Output : Odd

Method 1:
An even number is an integer which is “evenly divisible” by 2. This means that if the integer is divided by 2, it yields no remainder or 0 as remainder. Similarly, an Odd number is an integer which is not “evenly divisible” by 2 and will leaves 1 as remainder.

Below is the implementation of above approach:

// Scala program to check
// whether the given number
// is Even or Odd

// Creating Object
object W3Colleges {

  // Function to check  
  // whether the given number
  // is Even or Odd
  def isEvenOrOdd(N: Int): String = { 
    if (N % 2 == 0)
      "Even"
    else
      "Odd"
  } 

  // Driver Code 
  def main(args: Array[String]): Unit = { 
    val N = 10

    println(s"The number $N is ${isEvenOrOdd(N)}.") 
  } 
}

Output:

Even

Method 2: Using Bit Manipulation
This method is based on the fact that a number is Odd if Bit-wise AND (&) of the number with 1 is 1 and Even if 0.

Below is the implementation of above approach:

// Scala program to check
// whether the given number
// is Even or Odd

// Creating Object
object W3Colleges {

  // Function to check 
  // whether the given number
  // is Even or Odd through 
  // Bitwise AND operation
  def isEvenOrOdd(N: Int): String = { 
    if ((N & 1) == 1)
      "Odd"
    else
      "Even"
  } 

  // Driver Code 
  def main(args: Array[String]): Unit = { 
    val N = 10

    println(s"The number $N is ${isEvenOrOdd(N)}.") 
  } 
}

Output:

Even