Method and function declaration

Question

What is the difference between using parantheses and curly braces in function and method declaration?

def test() = (
  expression
  expression
)

and

def test() = {
  expression
  expression
}

maybe you will get help from here [http://stackoverflow.com/questions/4386127/what-is-the-formal-difference-in-scala-between-braces-and-parentheses-and-when] — Java, Feb 27 '12 at 13:03

score 5 · Accepted Answer · answered Feb 27 '12 at 14:58

Parenthesis delimit one expression, while curly braces delimit a series of statements and declarations, whose value is equal to the last statement.

So, parenthesis won't have semi-colon inference, which makes it well suited to breaking up a big line (a long chain of method calls) into multiple lines.

On the other hand, you can't declare anything in it, and, naturally, you can't have multiple statements.

score 4 · Answer 2 · answered Feb 27 '12 at 13:14

4

The difference is that the first one doesn't compile ;)

answered Feb 27 '12 at 13:14

agilesteel

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Method and function declaration

2 Answers2