HTML Quick Reference - HTML5 and CSS Comprehensive - page 672

Operators

Operators are symbols used to manipulate operands in an expression.

Operator Types
Table G-6 summarizes the JavaScript operator types.

Table G-6 Operator Types

Type Operator Name Description Example

Arithmetic Addition Adds two operands rtn 5 amt 1 5.6

1

- Subtraction Subtracts one operand from another

rtn 5 amt - disc

* Multiplication Multiplies one operand by another rtn 5 amt * .5

/ Division Divides one operand by another rtn 5 amt / 4

% Modulus Returns the remainder of a division operation

rtn 5 amt % 3

11 Increment Increases an operand by one newAmt 5 11 oldAmt

newAmt 5 oldAmt 11

- - Decrement Decreases an operand by one newAmt 5 - -oldAmt

newAmt 5 oldAmt- -

- Negation Returns the opposite value of an operand

newAmt 5 -oldAmt

Assignment 5 Assigns Assigns the value of the right operand to the left

operand

discRate 5 4

15 Combines Adds the value of the right operand to the value of

the left operand and assigns a new value to the left
operand

discRate 15 13

- 5 Subtracts Subtracts the value of the right operand from the

value of the left operand and assigns a new value
to the left operand

discRate - 5 3

* 5 Multiplies Multiplies the value of the right operand by the

value of the left operand and assigns a new value
to the left operand

discRate * 5 .2

/ 5 Divides Divides the value of the left operand by the value

of the right operand and assigns a new value to the
left operand

discRate / 5 10

% 5 Modulus Divides the value of the left operand by the value

of the right operand and assigns the remainder
(or zero) to the left operand

discRate % 5 5

Bitwise ~ Complement Performs a binary NOT secur 5 ~rights

<< Shift left Performs a binary shift left of the bits of an integer Op 5 15 << 1

>> Shift right Performs a binary shift right of the bits of an integer Op 5 15 >> 1

>>> Shift right with zero

extension

Performs a binary unsigned shift right on an integer

Op 5 15 >>> 1

& AND Performs a bitwise AND on an integer

Op 5 01111 & 11111

^ XOR Performs a bitwise XOR on an integer Op 5 01111 ^ 11111

| OR Performs a bitwise OR on an integer Op 5 01111 | 11111