In most languages there'd be an eval() statement.

In POV SDL there's a nasty Parse_String() macro in strings.inc

#include "strings.inc"

#declare var0 = "foo";
#declare var1 = "bar";
#declare var2 = "baz";

#declare J=0;
#while (J<3)
   #declare A = concat("var",str(J,1,0));
   #debug concat(Parse_String(A),"\n")
   #declare J=J+1;
#end


It is much nicer, and more efficient, to create var as an array and use 
var[J].

-- 
Mike Williams
Gentleman of Leisure

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