When I type
a <> "0" /. {a -> "1"}
I get the error
StringJoin::string: String expected at position 1 in a<>0. >>
Followed by the answer I want
"10"
What should I do instead so that I don't get the error?
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2 Answers
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Use one of the following
a <> "0" /. {a -> "1"} // Quiet
or
ReleaseHold[Hold[a <> "0"] /. {a -> "1"}]
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Make a lazier StringJoin:
stritch[a_String, b_String] := a <> b
stritch[a, "0"] /. a -> "1"
(* 10 *)
