quantity vs variable

variable vs quantity

quantity and variable both are nouns.

quantity is not an adjective while variable is an adjective.

Word	Noun	Adjective	Verb	Adverb
quantity	Yes	No	No	No
variable	Yes	Yes	No	No

As nouns, variable is a hyponym of quantity; that is, variable is a word with a more specific, narrower meaning than quantity:

quantity: the concept that something has a magnitude and can be represented in mathematical expressions by a constant or a variable
variable: a quantity that can assume any of a set of values

Other hyponyms of quantity include quantum, term, numerical quantity, operand, variable quantity, constant, constant quantity, invariable, parameter, mathematical product, product, amount, sum, total, proportional, binomial.

quantity (noun)	variable (noun)
how much there is or how many there are of something that you can quantify	a quantity that can assume any of a set of values
an adequate or large amount	a symbol (like x or y) that is used in mathematical or logical expressions to represent a variable quantity
the concept that something has a magnitude and can be represented in mathematical expressions by a constant or a variable	something that is likely to vary; something that is subject to variation
	a star that varies noticeably in brightness

quantity (adjective)	variable (adjective)
	liable to or capable of change
	(used of a device) designed so that a property (as e.g. light) can be varied
	marked by diversity or difference

Difference between quantity and variable

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