# Additional Codes for Apache Scala (Code-B4)

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## 1. Even-Odd Check

```scala
object EvenOddCheck {
  def main(args: Array[String]): Unit = {
    val number = 15
    if (number % 2 == 0) {
      println(s"$number is even")
    } else {
      println(s"$number is odd")
    }
  }
}
```

## 2. Factorial

```scala
object Factorial {
  def main(args: Array[String]): Unit = {
    val num = 5
    var factorial = 1
    for (i <- 1 to num) {
      factorial *= i
    }
    println(s"The factorial of $num is $factorial")
  }
}
```

## 3. String reversal

```scala
object ReverseString {
  def main(args: Array[String]): Unit = {
    val str = "Scala"
    val reversed = str.reverse
    println(s"The reverse of '$str' is '$reversed'")
  }
}
```

## 4. Find largest element in an array

```scala
object FindLargest {
  def main(args: Array[String]): Unit = {
    val numbers = Array(10, 20, 30, 40, 50)
    val largest = numbers.max
    println(s"The largest number in the array is $largest")
  }
}
```

## 5. Sum of two numbers

```scala
object SumOfTwoNumbers {
  def main(args: Array[String]): Unit = {
    val num1 = 10
    val num2 = 20
    val sum = num1 + num2
    println(s"The sum of $num1 and $num2 is $sum")
  }
}
```

## 6. Sum of two numbers (with user input)

```scala
import scala.io.StdIn

object AddTwoNumbers {
  def main(args: Array[String]): Unit = {
    println("Enter the first number:")
    val num1 = StdIn.readInt()
    println("Enter the second number:")
    val num2 = StdIn.readInt()
    
    val sum = num1 + num2
    println(s"The sum of $num1 and $num2 is $sum")
  }
}
```

## 7. Simple Calculator

```scala
import scala.io.StdIn

object SimpleCalculator {
  def main(args: Array[String]): Unit = {
    println("Enter the first number:")
    val num1 = StdIn.readDouble()
    println("Enter an operator (+, -, *, /):")
    val operator = StdIn.readChar()
    println("Enter the second number:")
    val num2 = StdIn.readDouble()

    val result = operator match {
      case '+' => num1 + num2
      case '-' => num1 - num2
      case '*' => num1 * num2
      case '/' => if (num2 != 0) num1 / num2 else "undefined (division by zero)"
      case _ => "Invalid operator"
    }

    println(s"The result is: $result")
  }
}
```

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