Javascript Reference Card (Page 6 of 6) in pdf

OPERATORS

COMPARISON

= =

Returns true if the operands are equal

Returns true if the operands are not equal

ARITHMETIC

= = =

Returns true if the operands are equal and the

addition

adds two numbers

same data type

–

subtraction

subtracts one number from

! = =

Returns true if the operands are not equal and/or

another

not the same data type

multiplication

multiplies two numbers

Returns true if the first operand is greater than

division

divides one number by another

the second

modulus

returns the integer remainder

> =

Returns true if the first operand is greater than or

after dividing two numbers

equal to the second

+ +

increment

adds one to a numeric variable

Returns true if the first operand is less than the

—

decrement

subtracts one from a numeric

second

variable

< =

Returns true if the first operand is less than or

equal to the second

STRING

concatenation

concatenates or joins two

ASSIGNMENT

strings or other elements

Assigns the value of the seond operand to the

+ =

concatenation/

concatenates two string

first operand

assignment

variables and assigns the

+ =

Adds two numeric operands and assigns the

result to the first variable

result to the first operand

– =

Subtracts the second operand from the first, and

LOGICAL

assigns the result to the first

logical AND

Compares two operands;

* =

Multiplies two operands, assigns the result to the

returns true if both are true,

first

otherwise returns false

/ =

Divides the first operand by the second, assigns

logical OR

Compares two operands;

the result to the first

returns true if either operand

% =

Finds the modulus of two numeric operands, and

is true, otherwise returns false

assigns the result to the first

logical NOT

Returns false if its operand

can be converted to true,

RESERVED WORDS

otherwise returns false

abstract

else

instanceof

switch

boolean

enum

int

synchronized

break

export

interface

this

byte

extends

long

throw

case

false

native

throws

catch

final

new

transient

char

finally

null

true

class

float

package

try

const

for

private

typeof

continue

function

protected

var

debugger

goto

public

void

default

return

volatile

delete

implements

shor

while

import

static

with

double

super

Javascript Reference Card Page 6

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