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Scala program to create a function with the default value for non-trailing arguments

Here, we are going to learn how to create a function with the default value for non-trailing arguments in Scala programming language?
Submitted by Nidhi, on May 27, 2021 [Last updated : March 09, 2023]

Scala – Creating a function with the default values

Here, we will define a function with the default value for non-trailing arguments. And, we used the only first argument with the default value. We can pass non-trailing arguments with default values using named parameters into the function.

Scala code to create a function with the default value for non-trailing arguments

The source code to create a function with the default value for non-trailing arguments is given below. The given program is compiled and executed on the ubuntu 18.04 operating system successfully.

// Scala program to create a function with default value
// for non-trailing arguments

object Sample {
  def main(args: Array[String]): Unit = {
    // Function calling
    printf("Addition is: %d\n", addNum(num1 = 30, num2 = 40));
    printf("Addition is: %d\n", addNum(num2 = 20));
  }
  
  // Function definition
  def addNum(num1: Int = 20, num2: Int): Int = {
    var result: Int = 0;

    result = num1 + num2;

    return result;
  }
}

Output

Addition is: 70
Addition is: 40

Explanation

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

In this program, we defined a function addNum() with two integer arguments num1 and num2. It will return the addition of both arguments on the console screen. And, we created the first argument with a default value.

In the main() function, we called the addNum() function with and without named parameters to use the default value of non-trailing arguments and printed the result on the console screen.

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