运算符优先级

Java 运算符优先级
运算符	优先级
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	`= += -= *= /= %= &= ^= \|= <<= >>= >>>=`

Java 运算符优先级

运算符

优先级

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++运算符优先级
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++运算符优先级

Precedence

Operator

Description

Associativity

::

Scope resolution

Left-to-right

++ --

Suffix/postfix increment and decrement

()

Function call

[]

Array subscripting

.

Element selection by reference

−>

Element selection through pointer

++ --

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

.* ->*

Pointer to member

Left-to-right

* / %

Multiplication, division, and remainder

+ −

Addition and subtraction

<< >>

Bitwise left shift and right shift

< <=

For relational operators < and ≤ respectively

> >=

For relational operators > and ≥ respectively

== !=

For relational = and ≠ respectively

&

Bitwise AND

^

Bitwise XOR (exclusive or)

|

Bitwise OR (inclusive or)

&&

Logical AND

||

Logical OR

?:

Ternary conditional

Right-to-Left

=

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

throw

Throw operator (for exceptions)

,

Comma

Left-to-right

C语言运算符优先级
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

C语言运算符优先级

Precedence

Operator

Description

Associativity

++ --

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)

++ --

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)

* / %

Multiplication, division, and remainder

Left-to-right

+ −

Addition and subtraction

<< >>

Bitwise left shift and right shift

< <=

For relational operators < and ≤ respectively

> >=

For relational operators > and ≥ respectively

== !=

For relational = and ≠ respectively

&

Bitwise AND

^

Bitwise XOR (exclusive or)

|

Bitwise OR (inclusive or)

&&

Logical AND

||

Logical OR

?:

Ternary conditional

Right-to-Left

=

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

,

Comma

Left-to-right

PHP运算符优先级
结合方向	运算符	附加信息
非结合	`clone new`	clone 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

PHP运算符优先级

结合方向

运算符

附加信息

非结合

clone new

clone 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

Python 运算符优先级
运算符	描述
`lambda`	Lambda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

Python 运算符优先级

运算符

描述

lambda

Lambda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

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