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Scala program to create an anonymous function using '_' wildcard

Here, we are going to learn how to create an anonymous function using '_' wildcard in Scala programming language?
Submitted by Nidhi, on May 28, 2021 [Last updated : March 09, 2023]

Scala – Creating an Anonymous Function (Using '_' Wildcard)

Here, we will define an anonymous function using the '_' wildcard to add two specified numbers and return the result to the calling function.

Scala code to create an anonymous function using '_' wildcard

The source code to create an anonymous function using the '_' wildcard is given below. The given program is compiled and executed on the ubuntu 18.04 operating system successfully.

// Scala program to create an anonymous function
// using "_" wildcard

object Sample {
  def main(args: Array[String]) {
    var result: Int = 0;

    // Create anonymous function.
    var AddNum = (_: Int) + (_: Int);

    // Function calling
    result = AddNum(10, 30);
    printf("Result : %d\n", result);
  }
}

Output

Result : 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 the main() function, we created an integer variable result, initialized with 0. Then we defined and called an anonymous function AddNum() with two integer arguments using the "_" wildcard. The AddNum() function adds two specified numbers and returns the result. After that, we printed the result on the console screen.

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