In Ruby, switch case statements are implemented using the case keyword, followed by the variable or value being compared and the when keyword, which represents a condition. Here is an example of how to use switch in Ruby:
# Example 1 - Using switch with integers
product_id = 3
case product_id
when 1
puts "Product 1: iPhone"
when 2
puts "Product 2: MacBook"
when 3
puts "Product 3: Apple Watch"
else
puts "Invalid product ID"
end
In this example, the product_id variable is being compared against several values using switch case statements. If product_id matches any of the when conditions, the corresponding message will be printed. If none of the conditions match, the else statement will be executed. The output of this code block is:
Product 3: Apple Watch
Switch statements can also work with non-integer values, such as strings or symbols. Here's an example that compares a string:
# Example 2 - Using switch with strings
fruit = "banana"
case fruit
when "apple"
puts "This is an apple"
when "banana"
puts "This is a banana"
when "orange"
puts "This is an orange"
else
puts "I don't know this fruit"
end
In this example, the fruit variable is compared against several possible string values. If fruit matches any of the when conditions, the corresponding message will be printed. If none of the conditions match, the else statement will be executed. The output of this code block is:
This is a banana
In summary, switch case statements in Ruby can be used to evaluate different conditions and perform different actions based on those conditions. It's a useful tool for handling multiple data values in a concise and understandable way.