Common operators and operator priority

One 、 Common operators
1、 Arithmetic operator
2、 Relational operator
3、 Logical operators
4、 Assignment operator
5、 Conditional operator （ The only ternary operator ）

Two 、 Arithmetic operator
Basic arithmetic operators
/ * % + -

3、 ... and 、 Relational operator
Test the relationship between two values , Return to true or false
<
<=

=
==
!=
===
!==

Four 、 Logical operators
-&&（ Logic and ）： Only when both the operand and the second operand are ture when , Others are false
-!!（ Logic or ）: Only when the first operand and the second operand are false, result false, Others are true
-!（ Logic is not ）: Inverse

5、 ... and 、 Assignment operator
=、+=、-=、*=、/=、%=

6、 ... and 、 Conditional operator
Ternary operator ：–？--：–
The first operand is Boolean , by ture, Calculate the second operand , And return the calculation results , otherwise , Calculate the third operand , And return the calculation results

7、 ... and 、 Operator priority

Operator	operation
！	Logic is not
* 、/、 %	ride 、 except 、 Remainder
<、<=、>、>=	Less than 、 Less than or equal to 、 Greater than 、 Greater than or equal to
==、!=	Judgment is equal to the 、 Judgment does not equal
===、!=	Judgement is equal to 、 Judgment is not equal to
&&	Logic and
ll	Logic or
？：	Conditional operator
=、+=、-=、*=、/=、%= etc.	Assignment operator