Switch case in Ruby on Rails

Switch case is a useful control structure in programming that allows you to execute different pieces of code depending on the value of a specific variable. In Ruby on Rails, the switch case structure is implemented using the case statement.

Syntax

The basic syntax of the case statement in Ruby on Rails is as follows:

case expression
when value1
  # code to execute if expression equals value1
when value2
  # code to execute if expression equals value2
when value3
  # code to execute if expression equals value3
else
  # code to execute if expression doesn't match any of the values
end

In this structure, expression is the variable that you want to compare against different values. Each when statement provides a specific value to compare the expression against, and the code within that when block is executed only if the values match. The else statement provides a default block of code to execute if none of the when statements match the expression.

Example

Here's an example of a switch case statement in Ruby on Rails:

fruit = "apple"

case fruit
when "banana"
  puts "You chose a banana!"
when "apple"
  puts "You chose an apple!"
when "orange"
  puts "You chose an orange!"
else
  puts "Sorry, that fruit is not available!"
end

In this example, the fruit variable is compared against different values using the when statements. Since the fruit variable is currently set to "apple", the code within the second when block is executed, and the output is "You chose an apple!".

Conclusion

In summary, the switch case structure in Ruby on Rails allows you to execute different pieces of code depending on the value of a specific variable. By using the case statement, you can easily compare a variable against multiple values and execute the appropriate code.