if you had to only ONE for the rest of your life, would you?

if you had to only ONE for the rest of your life, would you?
singular if true
mutable makes more sense to me as originally int p=0 is implicit, but later is mutable by the assignation p=p(n), according to the type of variable assigned. i mean some vars are complex, y'kno? bools are cute too tho.
(ps i'm being esoteric and don't currently know if this makes sense)