Constants

false

A unique Boolean value that represents the opposite of true.

Infinity

Specifies the IEEE-754 value representing positive infinity.

-Infinity

Specifies the IEEE-754 value representing negative infinity.

NaN

A predefined variable with the IEEE-754 value for NaN (not a number).

newline

Inserts a carriage return character (\r) that generates a blank line in text output generated by your code.

null

A special value that can be assigned to variables or returned by a function if no data was provided.

true

A unique Boolean value that represents the opposite of false.

undefined

A special value, usually used to indicate that a variable has not yet been assigned a value.