58 lines
1.5 KiB
Markdown
58 lines
1.5 KiB
Markdown
---
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title: Ruby Conditionals
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---
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Ruby has several commonly used conditionals.
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## If Statements
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An extremely common conditional in many programming languages, the statement tests if the condition is true, then branches into the specified action. An if statement consists of one `if`,
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any number of `elsif` and at most one `else` statement.
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* ```ruby
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fruit = :apple
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if fruit == :apple
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puts "Your fruit is an apple"
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elsif fruit == :orange
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puts "Your fruit is an orange"
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else
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puts "This is not an apple or an orange"
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end
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```
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### Unless statement
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An unless statement is the opposite of an if statement. It is the same as a negated if statement.
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* ```ruby
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happy = true
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if !happy
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puts "This person is not happy"
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end
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```
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The above statement equal to the statement below
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* ```ruby
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unless happy
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puts "This person is not happy"
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end
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```
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## Ternary Statement
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A ternary statement is used as a short conditional statement. It is written as follows
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*variable = condition ? true_result : false_result*
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* ```ruby
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game = "won"
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fans = game == "won" ? "happy" : unhappy
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fans # => "happy"
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```
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## Case Statement
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A case statement is similar to an if/elsif/else statement
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* ```ruby
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fruit = :apple
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case fruit
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when :apple
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puts "Your fruit is an apple"
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when :orange
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puts "Your fruit is an orange"
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else
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puts "This is not an apple or an orange"
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end
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```
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