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        Java/C++/C語言/PHP/Python運算符優先級對照表

        Java C++ C語言 PHP Python
        Java 運算符優先級
        運算符 優先級
        postfix expr++ expr--
        unary ++expr --expr +expr -expr ~ !
        multiplicative * / %
        additive + -
        shift << >> >>>
        relational < > <= >= instanceof
        equality == !=
        bitwise AND &
        bitwise exclusive OR ^
        bitwise inclusive OR |
        logical AND &&
        logical OR ||
        ternary ? :
        assignment = += -= *= /= %= &= ^= |= <<= >>= >>>=
        C++運算符優先級
        Precedence Operator Description Associativity
        1 :: Scope resolution Left-to-right
        2 ++   -- Suffix/postfix increment and decrement
        () Function call
        [] Array subscripting
        . Element selection by reference
        ?> Element selection through pointer
        3 ++   -- Prefix increment and decrement Right-to-left
        +   ? Unary plus and minus
        !   ~ Logical NOT and bitwise NOT
        (type) Type cast
        * Indirection (dereference)
        & Address-of
        sizeof Size-of
        new, new[] Dynamic memory allocation
        delete, delete[] Dynamic memory deallocation
        4 .*   ->* Pointer to member Left-to-right
        5 *   /   % Multiplication, division, and remainder
        6 +   ? Addition and subtraction
        7 <<   >> Bitwise left shift and right shift
        8 <   <= For relational operators < and ≤ respectively
        >   >= For relational operators > and ≥ respectively
        9 ==   != For relational = and ≠ respectively
        10 & Bitwise AND
        11 ^ Bitwise XOR (exclusive or)
        12 | Bitwise OR (inclusive or)
        13 && Logical AND
        14 || Logical OR
        15 ?: Ternary conditional Right-to-Left
        16 = Direct assignment (provided by default for C++ classes)
        +=   ?= Assignment by sum and difference
        *=   /=   %= Assignment by product, quotient, and remainder
        <<=   >>= Assignment by bitwise left shift and right shift
        &=   ^=   |= Assignment by bitwise AND, XOR, and OR
        17 throw Throw operator (for exceptions)
        18 , Comma Left-to-right
        C語言運算符優先級
        Precedence Operator Description Associativity
        1 ++ -- Suffix/postfix increment and decrement Left-to-right
        () Function call
        [] Array subscripting
        . Structure and union member access
        ?> Structure and union member access through pointer
        (type){list} Compound literal(C99)
        2 ++ -- Prefix increment and decrement Right-to-left
        + ? Unary plus and minus
        ! ~ Logical NOT and bitwise NOT
        (type) Type cast
        * Indirection (dereference)
        & Address-of
        sizeof Size-of
        _Alignof Alignment requirement(C11)
        3 * / % Multiplication, division, and remainder Left-to-right
        4 + ? Addition and subtraction
        5 << >> Bitwise left shift and right shift
        6 < <= For relational operators < and ≤ respectively
        > >= For relational operators > and ≥ respectively
        7 == != For relational = and ≠ respectively
        8 & Bitwise AND
        9 ^ Bitwise XOR (exclusive or)
        10 | Bitwise OR (inclusive or)
        11 && Logical AND
        12 || Logical OR
        13 ?: Ternary conditional Right-to-Left
        14 = Simple assignment
        += ?= Assignment by sum and difference
        *= /= %= Assignment by product, quotient, and remainder
        <<= >>= Assignment by bitwise left shift and right shift
        &= ^= |= Assignment by bitwise AND, XOR, and OR
        15 , Comma Left-to-right
        PHP運算符優先級
        結合方向 運算符 附加信息
        非結合 clone new clone 和 new
        [ array()
        非結合 ++ -- 遞增/遞減運算符
        非結合 ~ - (int) (float) (string) (array) (object) (bool) @ 類型
        非結合 instanceof 類型
        右結合 ! 邏輯操作符
        * / % 算術運算符
        + - . 算術運算符 和 字符串運算符
        << >> 位運算符
        非結合 < <= > >= <> 比較運算符
        非結合 == != === !== 比較運算符
        & 位運算符 和 引用
        ^ 位運算符
        | 位運算符
        && 邏輯運算符
        || 邏輯運算符
        ? : 三元運算符
        = += -= *= /= .= %= &= |= ^= <<= >>= 賦值運算符
        and 邏輯運算符
        xor 邏輯運算符
        or 邏輯運算符
        , 多處用到

        這個表給出Python的運算符優先級(從低到高).

        從最低的優先級(最松散地結合)到最高的優先級(最緊密地結合)。

        這意味著在一個表達式中,Python會首先計算表中較下面的運算符,然后在計算列在表上部的運算符。

        Python 運算符優先級
        運算符 描述
        lambda Lambda表達式
        or 布爾“或”
        and 布爾“與”
        not x 布爾“非”
        in,not in 成員測試
        is,is not 同一性測試
        <,<=,>,>=,!=,== 比較
        | 按位或
        ^ 按位異或
        & 按位與
        <<,>> 移位
        +,- 加法與減法
        *,/,% 乘法、除法與取余
        +x,-x 正負號
        ~x 按位翻轉
        ** 指數
        x.attribute 屬性參考
        x[index] 下標
        x[index:index] 尋址段
        f(arguments...) 函數調用
        (experession,...) 綁定或元組顯示
        [expression,...] 列表顯示
        {key:datum,...} 字典顯示
        'expression,...' 字符串轉換

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