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3.5.2 Special characters

The following characters and operators have special meanings:
=
assignment
{, }
parentheses for block programming
(, )
in expressions, for indexed names and for argument lists
[, ]
access operator for strings, integer vectors, ideals, matrices, polynomials, resolutions, and lists. Used to build vectors of polynomials. Example: s[3], m[1,3], i[1..3], [f,g+x,0,0,1].
+
addition operator
++
increment operator
-
subtraction operator
--
decrement operator
*
multiplication operator
/
division operator. See Miscellaneous oddities, for the difference between the division operators / and div.
%
modulo operator (mod is an alias to %): result is always non-negative
^ or **
exponentiation operator
==
comparison operator equal
!= or <>
comparison operator not equal
>=
comparison operator larger than or equal to
>
comparison operator larger
<=
comparison operator smaller than or equal to
<
comparison operator smaller. Also used for file input. See filecmd.
!
boolean operator not
&&
boolean operator and
||
boolean operator or
"
delimiter for string constants
`
delimiter for name substitution
?
synonym for help
//
comment delimiter. Comment extends to the end of the line.
/*
comment delimiter. Starts a comment which ends with */.
*/
comment delimiter. Ends a comment which starts with /*.
;
statement separator
,
separator for expression lists and function arguments
\
escape character for " and \ within strings
..
interval specifier returning intvec. E.g., 1..3 which is equivalent to the intvec 1, 2, 3.
:
repeated entry. E.g., 3:5 generates an intvec of length 5 with constant entries 3, i.e., (3, 3, 3, 3, 3).
::
accessor for package members. E.g., MyPackage::i accesses variable i in package MyPackage.
_
value of expression displayed last
~
breakpoint in procedures
#
list of parameters in procedures without explicit parameter list
$
terminates SINGULAR


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