The **`swapcase`** method in Ruby creates a copy of the original string. It converts uppercase characters of the original string to lowercase and lowercase characters to uppercase. 

> Uppercase characters consist of A-Z.

> Lowercase characters consist of a-z.

The illustration below shows how the `swapcase` method works in Ruby:

# Syntax

The `swapcase` method works on a string. We use the `.` operator to link the string with the method. Here is an example:
``` Ruby
"string".swapcase
```
# Return value

The `swapcase` method in Ruby returns a copy of the original string with cases swapped.

# Example

The code snippet below shows how we can use the `swapcase` method in Ruby:

puts "String".swapcase
puts "string".swapcase
puts "STRING".swapcase
puts "StRinG".swapcase

What is the swapcase method in Ruby?

The swapcase method in Ruby converts uppercase to lowercase and vice-versa, returning a new string.