The **`Stack.size` function** in Scala returns the number of elements in a `Stack` object. In short, this function is used to get the current size of the `Stack` object. 

The following illustration shows a visual representation of the `Stack.size` function.

>To use the `Stack.size` function, you must include the following module: 
```scala
scala.collection.mutable.Stack
```

# 
## Syntax

```scala
stack_name.size;
// where the stack_name is the name of the stack object
```

## Parameter
The `Stack.size` function does not require any parameters.

## Return value
This function returns the number of elements in the `Stack` object. 

## Code
The following code shows how to use the `Stack.size` function.


import scala.collection.mutable.Stack
object Main extends App {
  var stack = Stack[Int]()
  stack.push(0);
  stack.push(2);
  stack.push(5);
  stack.push(3);
  stack.push(1);
  
  println("The following are the elements in the stack: " + stack);
  println("The following is the size of the stack: " + stack.size);
}

## Explanation

The `push()` method is first used to add values to the object `stack`. The `size()` method in line $11$ returns the number of elements in the object `stack`.

What is stack.size() in Scala?

The Stack.size function in Scala returns the number of elements in the Stack object.