[R] R bug? (if-else problem in main program)

Prof Brian D Ripley ripley at stats.ox.ac.uk
Wed Nov 6 10:17:27 CET 2002

This is documented in many places.  See the help page for `if', or in
fuller detail, section 3.2 of the Language Manual.

The solution is to use braces

if(a == 1) {
} else {

as described in ?"if".

On Tue, 5 Nov 2002, Anita Gulyasne Goldpergel wrote:

> I've found a very interesting problem in R: the if-else statement doesn't
> work in a main program. Sounds crazy, but true.

This is not `a main program' but using R interactively at the top (prompt)
level.  It will work in a function, the only sort of `programs' that exist
in R.

The help and manuals are your friends!


Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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