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st: unconventional use of if condition

From   tashi lama <>
To   <>
Subject   st: unconventional use of if condition
Date   Fri, 29 Jun 2012 15:09:18 +0000


    In the fetchyahooquotes.ado written by Mehmet F. Diche, Ph.D. and John Levendis, Ph.D., I encountered following use of if

     if ("`start'"!="") drop if date<(date("`start'", "DMY"))
     if ("`end'"!="") drop if date>(date("`end'", "DMY"))


I was under the impression and the documentation rightly says to precede 'if' with braces ("{") followed by command in the next line. Sth like this 


if x==4 {




Could someone explain me this?



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