Javascript 6 and 7 and 8

Variable

a named container for storing data that a program can use and change while it runs

String

a collection of characters that can include letters, special characters and numbers.

Number

JSCript recognize two numbers Integers and Floating point

Boolean

has two values True and False

Null

“nothing or no data”

Expression

is any valid set of literals or values, variables and operators that evaluates to a single value; it can be a number, string or logical value.

Arithmetic Operators

are used to perform mathematical calculations, such as addition(+), subtraction(-), division(/), multiplication(*) and modulus(%)

Modulus Division

It gives you the remainder after dividing one number by another