How do you add numbers in Scala?

How do you add numbers in Scala?

Scala Code Editor :

1. object scala_basic {
2. def test(x:Int, y:Int) : Int =
3. {
4. if (x == y) (x + y) * 3 else x + y.
5. }
6. def main(args: Array[String]): Unit = {
7. println(“Result: ” + test(1, 2));
8. println(“Result: ” + test(2, 2));

What does foldLeft do in Scala?

The foldLeft method takes an associative binary operator function as parameter and will use it to collapse elements from the collection. The order for traversing the elements in the collection is from left to right and hence the name foldLeft. The foldLeft method allows you to also specify an initial value.

How do you sum a list in Scala?

Scala List sum() method with example. The sum() method is utilized to add all the elements of the stated list. Return Type: It returns the sum of all the elements of the list.

How do you sum a List in Scala?

What is the advantage of Scala?

The Advantages of Scala Scala has an exact syntax, eliminating boilerplate code. Programs written in Scala require less code than similar programs written in Java. It is both an object-oriented language and a functional language. This combination makes Scala the right choice for web development.

How do I convert a list to map in Scala?

In Scala, you can convert a list to a map in Scala using the toMap method. A map contains a set of values i.e. key-> value but a list contains single values. So, while converting a list to map we have two ways, Add index to list.

Is Scala list ordered?

In Scala we do not sort Lists in-place. They are immutable. But we use lambda expressions, and the Ordering type, to create sorted copies of these lists.

How to write a sum list in Scala?

Sum Lists function in Scala. Sum Lists: You have two numbers represented by a linked list, where each node contains a single digit. The digits are stored in reverse order, such that the 1 ‘s digit is at the head of the list. Write a function that adds the two numbers and returns the sum as a linked list.

What to do if list is empty in Scala?

In Scala [If] is an expression and returns a value, this will be returned as the value of the sum function. So your code will be refactored to: If list is empty return 0 else you add the to the head number the rest of the list This isn’t tail recursive, but it’s easy to understand.

How is a recursive function implemented in Scala?

Recursive Scala functions are often implemented using match expressions. Using (a) that information and (b) remembering that an empty list contains only the Nil element, you can start writing the body of the sum function like this: This is a Scala way of saying, “If the List is empty, return 0 .”

How to create and tabulate a list in Scala?

You can use a function along with List.tabulate () method to apply on all the elements of the list before tabulating the list. Its arguments are just like those of List.fill: the first argument list gives the dimensions of the list to create, and the second describes the elements of the list.