None Explained

None may refer to:

Zero, the mathematical concept of the quantity "none"
Empty set, the mathematical concept of the collection of things represented by "none"
none, an indefinite pronoun in the English language

Music

None (Meshuggah EP), 1994
None (Cloak of Altering EP), 2016

Other uses

None (liturgy), the ninth hour of the traditional Christian liturgy
None, Piedmont, a commune in the province of Turin in the Italian region of Piedmont
Irreligion, a lack of religious affiliation
None of the above, a political expression for rejecting all available candidates
None, the keyword for the null pointer in Python

See also