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Scala program to demonstrate the throw keyword

Here, we are going to demonstrate the throw keyword in Scala programming language.
Submitted by Nidhi, on June 07, 2021 [Last updated : March 12, 2023]

Scala - Throw Keyword Example

Here, we will demonstrate the throw keyword. The throw keyword is used to generate an exception manually with a specified message.

Scala code to demonstrate the throw keyword

The source code to demonstrate the throw keyword is given below. The given program is compiled and executed on the ubuntu 18.04 operating system successfully.

// Scala program to demonstrate the throw keyword

object Sample {
  // Main method
  def main(args: Array[String]) {
    var num1: Int = 0;
    var num2: Int = 10;
    var res: Int = 0;

    try {
      if (num1 == 0)
        throw new ArithmeticException("Divide by zero exception")
      else
        res = num2 / num1;

      printf("Result: %d", res);
    } catch {
      case e: Throwable => println(e);
    } finally {
      println("Finally block executed")
    }
  }
}

Output

Array elements: 
1 2 3 4 5 
Finally block executed

Explanation

In the above program, we used an object-oriented approach to create the program. And, we created a singleton object Sample and defined the main() function. The main() function is the entry point for the program.

In the main() function, we created three integer variables num1, num2, res, that are initialized with 0, 10, 0. Then we checked the condition to handle divide by zero exception, if the value of variable num1 is 0 then it will throw an exception with the specified message. The generated exception is caught in the catch block. After that, the finally block gets executed and then printed "Finally block executed" message on the console screen.

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