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    Java 運算符優先級
    運算符優先級
    postfixexpr++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
    17throw 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 newclone 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
    lambdaLambda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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