New for Mathematica 12(?) seems to be a formatted "black board" style of the former C[1], C[2], ... constants in Mathematica 11. How do I type these with formatting at input? C[1] etc. still works, but how to write it formatted? I could not find it in the escape sequence list. TIA.
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You could use InputAutoReplacements so that c1 gets automatically converted:
CurrentValue[EvaluationNotebook[], {InputAutoReplacements,"c1"}] = TemplateBox[{"1"},"C"];
or you could use InputAliases so that you need to use the Esc key as usual:
CurrentValue[EvaluationNotebook[], {InputAliases,"c2"}] = TemplateBox[{"2"}, "C"];
answered Aug 27, 2020 at 18:07
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$\begingroup$ That is so 'cool'. There is so much to discover in Mathematica, but very hard to learn (without asking on this excellent site). $\endgroup$– mf67Commented Aug 27, 2020 at 18:55
C[1]as usual, highlight it, and then evaluate it in place withCtrl+Shift+Enter. $\endgroup$TemplateBox[{"i"}, "C"]so you can always copy, paste, and edit that. If you're working with formulae and are gonna send them through the FE you can doFormat[Subscript[\[ConstantC], i_]] := RawBoxes@TemplateBox[{ToBoxes[i]}, "C"];and then use that form and have it spit out the appropriateC[i]form after evaluation. You can also addMakeExpression[SubscriptBox["\[ConstantC]", i_], _] := C[ToExpression[i]]to make it a proper alias ofC[i]or modifyInputAliasesto give youTemplateBox[{"\[Placeholder]"}, "C"]. $\endgroup$