[R] if then else

[Duncan Murdoch]

On 9/30/2006 6:29 AM, Uwe Ligges wrote:
> 
> Jue.Wang2 at sanofi-aventis.com wrote:
>> What is the correct form to write statement meaning:
>>
>> if (a==1) {b=2; c=3}; else {b=0; c=0};
> 
> 
> if (a==1) {b=2; c=3} else {b=0; c=0};

That's valid, but is it "correct form"?  The semicolon at the end is not 
needed.  I'd say it's a bad idea to use one, because it might give a 
mistaken impression about the meaning of something like

  a = 1
      + 2;

It's better to avoid semi-colons whenever possible, to make sure the C 
parser in your brain throws an exception and lets the R parser take over.

Duncan Murdoch