Operator Features in Programming Languages
The following table shows the operator features in several programming languages:
| Programming language | Nonalphanumeric operator symbols | Alphanumeric operator symbols | Prefix | Infix | Postfix | Precedence | Associativity | Overloading | Programmer-defined overloading | Programmer-defined operator symbols |
|---|---|---|---|---|---|---|---|---|---|---|
| ALGOL 68 | +* ** * / % %* %× - + < <= >= > = /= & -:= +:= *:= /:= %:= %*:= +=: :=: :/=:
(All operators have bold Alphanumeric equivalents, c.f. next column. Some have non ASCII equivalents, c.f. below.) ¬ +× ⊥ ↑ ↓ ⌊ ⌈ × ÷ ÷× ÷* □ ≤ ≥ ≠ ∧ ∨ ×:= ÷:= ÷×:= ÷*:= %×:= :≠: |
not abs arg bin entier leng level odd repr round shorten i shl shr up down lwb upb lt le ge gt eq ne and or over mod elem minusab plusab timesab divab overab modab plusto is isnt | Yes | Yes | No | Yes | Infix operators are left associative, prefix operators are right associative | Yes | Yes | Yes |
| C | -> . ! ~ ++ -- + - * & / % << >> < <= > <= == != ^ | && || ?: = += -= *= /= %= &= ^= |= <<= >>= | sizeof | Yes | Yes | Yes | Yes | Yes | Yes | No | No |
| C++ (more) | sizeof new delete throw decltype | Yes | Yes | Yes | Yes | Yes | Yes | Yes | No | |
| Java | new instanceof | Yes | Yes | Yes | Yes | Yes | Yes | No | No | |
| Haskell | + - * / ^ ^^ ** == /= > < >= <= && || >>= >> $ $! . ++ !! : | Yes, by putting a function's name into backticks | Yes | Yes | No | Yes | Yes | Yes, using Type classes | Yes | |
| Pascal | * / + - = < > <> <= >= := | not div mod and or in | Yes | Yes | No | Yes | Yes | Yes | No | No |
| Seed7 | {} -> ** ! + - * / << >> & >< | = <> > >= < <= <& := +:= -:= *:= /:= <<:= >>:= &:= @:= | conv varConv parse conj div rem mdiv mod times mult in not and or digits lpad rpad lpad0 | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Eiffel | + - * / // = /= | not and or implies "and then" "or else" | Yes | Yes | No | Yes | Yes | No | Yes | Yes |
| Prolog | spy nospy not is mod | Yes | Yes | Yes | Yes | Yes | No | No | Yes | |
| Lisp | Lisp defines all functions and symbols as operators. Following the definition in this page, Lisp has no operators. | Yes | No | No | No | No | No | No | Yes | |
| Smalltalk | (yes - Up to two characters) | (yes - Needs a colon after the keyword) | No | Yes | Yes | No | No | Yes | Yes | Yes |
| Perl | -> ++ -- ** ! ~ \ + - . =~ !~ * / % < > <= >= == != <=> ~~ & | ^ && || ' | print sort chmod chdir rand and or not xor lt gt le ge eq ne cmp x | Yes | Yes | Yes | Yes | Yes | Yes | Yes | No |
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