Is there a REPL shortcut for a subscript numeral?

[Douglas Bates]

I find it convenient to use identifiers like 

julia> a₁ = 2

2

In the iESS emacs mode for a Julia session I can set the input-mode to TeX and type "a_1" to create this identifier.  Is there a key sequence in the REPL to create such an identifier?

[John Myles White]

Try typing the sequence \_1<TAB>

 — John

[Douglas Bates]

On Wednesday, August 20, 2014 10:10:15 AM UTC-5, John Myles White wrote:

Try typing the sequence \_1<TAB>

Thanks. 

[Vitor Aguiar]

Can also do 

\Theta\_\pi

?

[Stefan Karpinski]

Unicode only supports some (fairly arbitrary) subscripts and superscripts. I doubt that pi is one of them.

[Jiahao Chen]

The manual has a list of supported tab completions:

http://julia.readthedocs.org/en/release-0.3/manual/unicode-input/

http://julia.readthedocs.org/en/latest/manual/unicode-input/

[Dominique Orban]

I really enjoy the unicode feature. It's too bad that

julia> ‖A‖² = 1.234
ERROR: syntax: invalid character "‖"

[Steven G. Johnson]

On Sunday, April 26, 2015 at 12:10:05 AM UTC-4, Dominique Orban wrote:

I really enjoy the unicode feature. It's too bad that

julia> ‖A‖² = 1.234
ERROR: syntax: invalid character "‖"

 
‖ is not allowed in identifiers because it is a punctuation character (Unicode category Po), and we may want to assign some syntactic meaning to it or other punctuation characters in the future (or have it be user-assignable in some way).