Basic JavaScript Learning (iii)

The JavaScript operator

Learning Essentials:

An expression

Operators: Unary operators, arithmetic operators, relational operators, logical operators, * bitwise operators, assignment operators

I. Expressions

Expressions have constant expressions, variable expressions, and compound expressions.

Second, arithmetic operators

Unary:+ (plus),-(minus sign), + + 、——

Binary: *,/,%,+,-

Third, relational operators

= =, = = = PS: The equivalent operator is more stringent than the equality operator, and the equivalent operator returns true only if the two operand types are the same and the values are the same.

<, <=, >, >=

Instanceof operator, in operator: In the case of an object, the in operator compares the property name of the object;

For arrays, the in operator compares the subscript of an array.

Four, logical operators

&&, | |,!

V. Bitwise OPERATORS

&, |, ~ (non) (This operation uses the original code, complement, negation, etc.), ^ (XOR)

>>, <<,

Vi. Other operators

Conditional operator:? ：

String operator: +

Other operators: New, void, typeof,. (object property access), [] (array element access), delete, this

Vii. Precedence of Operators

　　

　　

Basic JavaScript Learning (iii)