Introduction of New Predefined Dash "–" Variable

[rdbyk]

– may serve different purposes

1. Shorthand for void()

--> –
 –  = 

    Undefined

--> void()
 ans  =

    Undefined

2. Ignore Output Arguments

--> [a,b]=frexp(7.93)
 a  = 

   0.99125
 b  = 

   3.

--> clear a b

--> [–,b]=frexp(7.93)
 b  = 

   3.

--> a

Undefined variable: 'a'.

--> clear b

--> [a,–]=frexp(7.93)
 a  = 

   0.99125

--> b

Undefined variable: 'b'.

Remarks:

• Assignations to the protected – variable are silently ignored
• The special features (cf. above) may be disabled using unprotect('–')
• – corresponds to Unicode U+2013 aka UTF8 e28093
• Pressing AltGr+- under Ubuntu produces the – character