运算符优先级

Java 运算符优先级运算符优先级postfixexpr++ expr--unary++expr --expr +expr -expr ~ !multiplicative* / %additive+ -shift<< >> >>>relational< > <= >= instanceofequality== !=bitwise AND&bitwise exclusive OR^bitwise inclusive OR|logical AND&&logical OR||ternary? :assignment= += -= *= /= %= &= ^= |= <<= >>= >>>=

C++运算符优先级PrecedenceOperatorDescriptionAssociativity1::Scope resolutionLeft-to-right2++   --Suffix/postfix increment and decrement()Function call[]Array subscripting.Element selection by reference−>Element selection through pointer3++   --Prefix increment and decrementRight-to-left+   −Unary plus and minus!   ~Logical NOT and bitwise NOT(type)Type cast*Indirection (dereference)&Address-ofsizeofSize-ofnew, new[]Dynamic memory allocationdelete, delete[]Dynamic memory deallocation4.*   ->*Pointer to memberLeft-to-right5*   /   %Multiplication, division, and remainder6+   −Addition and subtraction7<<   >>Bitwise left shift and right shift8<   <=For relational operators < and ≤ respectively>   >=For relational operators > and ≥ respectively9==   !=For relational = and ≠ respectively10&Bitwise AND11^Bitwise XOR (exclusive or)12|Bitwise OR (inclusive or)13&&Logical AND14||Logical OR15?:Ternary conditionalRight-to-Left16=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 OR17throwThrow operator (for exceptions)18,CommaLeft-to-right

C语言运算符优先级PrecedenceOperatorDescriptionAssociativity1++ --Suffix/postfix increment and decrementLeft-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 decrementRight-to-left+ −Unary plus and minus! ~Logical NOT and bitwise NOT(type)Type cast*Indirection (dereference)&Address-ofsizeofSize-of_AlignofAlignment requirement(C11)3* / %Multiplication, division, and remainderLeft-to-right4+ −Addition and subtraction5<< >>Bitwise left shift and right shift6< <=For relational operators < and ≤ respectively> >=For relational operators > and ≥ respectively7== !=For relational = and ≠ respectively8&Bitwise AND9^Bitwise XOR (exclusive or)10|Bitwise OR (inclusive or)11&&Logical AND12||Logical OR13?:Ternary conditionalRight-to-Left14=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 OR15,CommaLeft-to-right

PHP运算符优先级结合方向运算符附加信息非结合clone newclone 和 new左[array()非结合++ --递增／递减运算符非结合~ - (int) (float) (string) (array) (object) (bool) @类型非结合instanceof类型右结合!逻辑操作符左* / %算术运算符左+ - .算术运算符 和 字符串运算符左<< >>位运算符非结合< <= > >= <>比较运算符非结合== != === !==比较运算符左&位运算符 和 引用左^位运算符左|位运算符左&&逻辑运算符左||逻辑运算符左? :三元运算符右= += -= *= /= .= %= &= |= ^= <<= >>=赋值运算符左and逻辑运算符左xor逻辑运算符左or逻辑运算符左,多处用到

这个表给出Python的运算符优先级（从低到高）.

从最低的优先级（最松散地结合）到最高的优先级（最紧密地结合）。

这意味着在一个表达式中，Python会首先计算表中较下面的运算符，然后在计算列在表上部的运算符。

Python 运算符优先级运算符描述lambdaLambda表达式or布尔“或”and布尔“与”not x布尔“非”in，not in成员测试is，is not同一性测试<，<=，>，>=，!=，==比较|按位或^按位异或&按位与<<，>>移位+，-加法与减法*，/，%乘法、除法与取余+x，-x正负号~x按位翻转**指数x.attribute属性参考x[index]下标x[index:index]寻址段f(arguments...)函数调用(experession,...)绑定或元组显示[expression,...]列表显示{key:datum,...}字典显示'expression,...'字符串转换

出自：http://tool.oschina.net/commons?type=6