[RUBY] About the ternary operator

I learned about the ternary operator when creating an application, so I will keep it as a memorandum.

What is a ternary operator?

Operator used when you want to write "if ~ else ~" in one sentence

Example) (The result is the same)

① Describe with if ~ else

if hoge == 3

② Use ternary operator

hoge == 3 ? 'true' : 'false'

Used when condition 1 is incorrect

 It seems to be convenient, but it may be difficult to understand if the expression becomes complicated, so it is important to use it properly.
 The Ruby reference lists it with the `` conditional operator'', and the rails documentation lists it with the `` `ternary operator ```.
 When I looked it up, there seems to be no difference.

### Reference article

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