Operators

Question 1

assignment operator

Answer 1

(=) assigns a value to a variable
Ex: Assignment
var x = 10;

Question 2

addition operator

Answer 2

(+) adds numbers
Ex: Adding
var x = 5;
var y = 2;
var z = x + y;

Question 3

multiplication operator

Answer 3

(*) multiplies numbers
Ex: Multiplying
var x = 5;
var y = 2;
var z = x * y;

Question 4

+

Answer 4

Addition

Question 5

-

Answer 5

Subtraction

Question 6

*

Answer 6

Multiplication

Question 7

/

Answer 7

Division

Question 8

%

Answer 8

Modulus

Question 9

++

Answer 9

Increment

Question 10

–

Answer 10

Decrement

Question 11

=

Ex: x = y

Answer 11

Same As:

x = y

Question 12

+=

EX: x += y

Answer 12

Same As:

x = x + y

Question 13

-=

Ex: x -= y

Answer 13

Same As:

x = x - y

Question 14

*=

Ex: x *= y

Answer 14

Same As:

x = x * y

Question 15

/=

Ex: x /= y

Answer 15

Same As:

x = x / y

Question 16

%=

Ex: x %= y

Answer 16

Same As:

x = x % y

Question 17

addition assignment operator

Answer 17

(+=) adds a value to a variable

Question 18

what can the + be used for?

Answer 18

also be used to add (concatenate) strings
Example
txt1 = "John";
txt2 = "Doe";
txt3 = txt1 + " " + txt2;

Question 19

+= assignment operator

Answer 19

also be used to add (concatenate) strings

Question 20

When used on strings the + operator is called ?

Answer 20

concatenation operator

Question 21

Can you add strings and numbers together?

Answer 21

Yes, Adding two numbers, will return the sum, but adding a number and a string will return a string

Example
x = 5 + 5;
y = “5” + 5;
z = “Hello” + 5;

Question 22

What happen when you add a number and a string?

Answer 22

the result will be a string

Question 23

==

Answer 23

equal to

Question 24

===

Answer 24

equal value and equal type

Question 25

!=

Answer 25

not equal

Question 26

!==

Answer 26

not equal value or not equal type

Question 27

>

Answer 27

greater than

Answer 28

less than

Question 29

> =

Answer 29

greater than or equal to

Question 30

<=

Answer 30

less than or equal to

Question 31

?

Answer 31

ternary operator

Question 32

&&

Answer 32

logical and

Question 33

||

Answer 33

logical or

Question 34

!

Answer 34

logical not

Question 35

typeof

Answer 35

Returns the type of a variable

Question 36

instanceof

Answer 36

Returns true if an object is an instance of an object type

Question 37

&

Answer 37

AND

Question 38

|

Answer 38

OR

Question 39

~

Answer 39

NOT

Answer 40

XOR

Question 41

<

Answer 41

Zero fill left shift

Question 42

> >

Answer 42

Signed right shift

Question 43

> > >

Answer 43

Zero fill right shift

Question 44

Bitwise Operators

Answer 44

work on 32 bits numbers

Any numeric operand in the operation is converted into a 32 bit number

Question 45

what is the assignment sign?

Answer 45

=

Question 46

= is what

Answer 46

The assignment to a var

Question 47

What is the equality or equal to sign?

Answer 47

==

Question 48

== is what?

Answer 48

equality or equal to commend.

Question 49

=== is what?

Answer 49

strict equality or equal to commend.

Question 50

What operators should be used when you are checking for equality within JS?

Answer 50

===

Question 51

if ( a == b)

Answer 51

equal to

Question 52

if ( a != b)

Answer 52

not equal to

Question 53

if ( a === b)

Answer 53

strict equality

Question 54

if ( a !== b)

Answer 54

not equal to

Question 55

if ( a > b)

Answer 55

greater than

Question 56

if ( a < b)

Answer 56

less than

Question 57

if ( a >= b)

Answer 57

greater than or equal to

Question 58

if ( a <= b)

Answer 58

less than or equal to

Question 59

&&

Answer 59

and

Question 60

||

Answer 60

or