Punctuation

Extended documentation for mathematical symbols & functions is here.

symbol meaning
@m invoke macro m; followed by space-separated expressions
! prefix "not" (logical negation) operator
a!( ) at the end of a function name, ! is used as a convention to indicate that a function modifies its argument(s)
# begin single line comment
#= begin multi-line comment (these are nestable)
=# end multi-line comment
$ string and expression interpolation
% remainder operator
^ exponent operator
& bitwise and
&& short-circuiting boolean and
| bitwise or
|| short-circuiting boolean or
⊻ bitwise xor operator
* multiply, or matrix multiply
() the empty tuple
~ bitwise not operator
\ backslash operator
' complex transpose operator Aᴴ
a[] array indexing (calling getindex or setindex!)
[,] vector literal constructor (calling vect)
[;] vertical concatenation (calling vcat or hvcat)
[   ] with space-separated expressions, horizontal concatenation (calling hcat or hvcat)
T{ } parametric type instantiation
; statement separator
, separate function arguments or tuple components
? 3-argument conditional operator (used like: conditional ? if_true : if_false)
"" delimit string literals
'' delimit character literals
` ` delimit external process (command) specifications
... splice arguments into a function call or declare a varargs function
. access named fields in objects/modules (calling getproperty or setproperty!), also prefixes elementwise function calls (calling broadcast)
a:b range a, a+1, a+2, ..., b
a:s:b range a, a+s, a+2s, ..., b
: index an entire dimension (firstindex:lastindex), see Colon)
:: type annotation or typeassert, depending on context
:( ) quoted expression
:a symbol a
<: subtype operator
>: supertype operator (reverse of subtype operator)
=== egal comparison operator

© 2009–2019 Jeff Bezanson, Stefan Karpinski, Viral B. Shah, and other contributors
Licensed under the MIT License.
https://docs.julialang.org/en/v0.7.0/base/punctuation/