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A Boolean data type can be either ____ or false.
Usually intentional, the ____ data type denotes a nonexistent or invalid object or address. This data type keyword is always all lowercase.
The data type ____ is automatically assigned to any variable without a defined value.
Used to represent a sequence of characters as text, a value of the ____ data type can be enclosed in either single or double quotes depending on the preference of the programmer.
data and instructions
Newly introduced in ECMAScript 6, instances of the ____ data type are unique and cannot be changed once they are created.
____ converts a string into a whole number, so it won't help with decimals. It is best to include the radix argument after your string. This ensures you get the result you need. (Give it the number 10 to receive a decimal.)
The ____ function parses a string argument and returns a floating point number.