Why methods always return a value in Ruby - Quick Recap

Recall & Review

beginner

What does every method in Ruby return by default?

Every method in Ruby returns the value of the last evaluated expression automatically, even if you don't use the return keyword.

beginner

Why does Ruby methods always return a value?

Ruby is designed so that methods always return a value to make code concise and expressive, allowing you to use the result of a method directly without extra steps.

beginner

What happens if you use the return keyword inside a Ruby method?

Using return immediately exits the method and returns the specified value, overriding the default behavior of returning the last evaluated expression.

beginner

How can you explain Ruby's method return behavior using a real-life example?

Think of a vending machine: when you press a button (call a method), it always gives you something back (returns a value), even if it’s just a message or a snack.

beginner

Can a Ruby method return nil?

Yes, if the last evaluated expression is nil or if the method has no expressions, Ruby returns nil by default.

What does a Ruby method return if there is no explicit return statement?

A The value of the last evaluated expression

B Nothing (no return value)

C Always <code>nil</code>

D An error

Ruby methods automatically return the value of the last evaluated expression if no explicit return is used.

What does the return keyword do inside a Ruby method?

A Skips the next line of code

B Ends the method and returns the specified value immediately

C Returns the last evaluated expression

D Raises an error

Using return exits the method immediately and returns the given value.

If a Ruby method has no expressions inside, what will it return?

A An empty string

B 0

C <code>nil</code>

D An error

When a method has no expressions, Ruby returns nil by default.

Why does Ruby always return a value from methods?

A To slow down the program

B Because it is required by the compiler

C To prevent errors

D To make code concise and allow chaining of method calls

Ruby’s design encourages concise code and method chaining by always returning a value.

Which of these is true about Ruby method returns?

A They always return a value, even if it is <code>nil</code>

B They return only when <code>return</code> is used

C They never return <code>nil</code>

D They return multiple values by default

Ruby methods always return a value; if nothing else, they return nil.

Explain why Ruby methods always return a value and how this affects writing code.

Think about how Ruby treats the last line inside a method.

Describe what happens when you use the return keyword inside a Ruby method.

Consider how <code>return</code> changes the flow inside a method.