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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
      左 [ 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
      左 * / % 算術運算符
      左 + - . 算術運算符 和 字符串運算符
      左 << >> 位運算符
      非結合 < <= > >= <> 比較運算符
      非結合 == != === !== 比較運算符
      左 & 位運算符 和 引用
      左 ^ 位運算符
      左 | 位運算符
      左 && 邏輯運算符
      左 || 邏輯運算符
      左 ? : 三元運算符
      右 = += -= *= /= .= %= &= |= ^= <<= >>= 賦值運算符
      左 and 邏輯運算符
      左 xor 邏輯運算符
      左 or 邏輯運算符
      左 , 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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