Variables and Data Types

What data type to store a mobile phone number?

• float

• integer

• string

Which of the following is a valid variable name in JavaScript?

• 1number

• html

• number

• *number

What is the result of "80" + 71.2?

• 151.2

• 151

• "8071.2"

What data type to store the price of a CD?

• boolean

• float

• string

• integer

What data type to store a postcode: IP4 5HD?

• boolean

• float

• integer

• string

5Price is a valid variable name in JavaScript.

• true

• false

A declared variable without assigning any value to it is called Null.

• true

• false

If you add a string and a number, the result will be a number.

• true

• false

Below is an example of how you will declare a variables in one single line .

Var month=”July”; date=3; year= 2019;

• true

• false

After execution of the following code, the value of G10 is Red?

var G10 = “green”;

var G7 = “yellow”;

var G8 = “blue”;

var G9 = “red”;

G7=G10;

G9 = G7;

G8=G9;

G10=G8;

• true

• false