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Scala program to create a function with default arguments

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

Scala – Function with Default Arguments

Here, we will define a function with arguments with default values and return a value without using the return statement. And, we will pass two integer arguments to add both numbers and return the result to the calling function.

Here, we will use only the "=" operator in the function definition to denote that, the created function will return a value.

Scala code to create a function with default arguments

The source code to create a function with default 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 arguments

object Sample {
  def main(args: Array[String]): Unit = {
    // Function calling
    printf("Addition is: %d\n", addNum(30, 40));
    printf("Addition is: %d\n", addNum(30));
    printf("Addition is: %d\n", addNum());
  }
  
  // Function definition
  def addNum(num1: Int = 10, num2: Int = 30): Int = {
    var result: Int = 0;

    result = num1 + num2;

    result;
  }
}

Output

Addition is: 70
Addition is: 60
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 with default values 10, 30 and return result to the calling function.

In the main() function, we called addNum() function with the different number of arguments to demonstrate the use of default values and printed the result on the console screen.

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