Hi, `+` is addition operator: https://docs.perl6.org/routine/$PLUS_SIGN#(Operators)_infix_+
String concatenation operator is `~`: https://docs.perl6.org/routine/$TILDE#(Operators)_infix_~ So you should write: print "Perl Version = " ~ $*PERL ~ "\n"; Or use `say` or `put` to add a newline: say "Perl Version = $*PERL"; So for your commented line, you can write: say "Display = %*ENV<DISPLAY>" On 2017-01-13 09:01:32 GMT, Todd Chester wrote: > Hi All, > > I am trying to understand how to read variables from the > shell's environment. I am reading this: > > https://docs.perl6.org/language/variables#Dynamic_variables > > <code> > #!/usr/bin/perl6 > # print "Display = " + %*ENV{'DISPALY'} + "\n"; > print "Perl Version = " + $*PERL + "\n"; > </code> > > > $ ./env.pl6 > Cannot resolve caller Numeric(Perl: ); none of these signatures match: > (Mu:U \v: *%_) > in block <unit> at ./env.pl6 line 3 > > > What am I missing? I'd like to get the one I commented > out on line 2 working too. That gives me the following error: > > Use of uninitialized value of type Any in numeric context > in block <unit> at ./env.pl6 line 2 > Cannot convert string to number: base-10 number must begin with valid > digits or '.' in '⏏Display = ' (indicated by ⏏) > in block <unit> at ./env.pl6 line 2 > > > Many thanks, > -T
