How to write n-, iso, and neobutane

There is no neobutane, only n-butane and isobutane. n-Butane:CH3-CH2-CH2-CH3Iso-Butane:CH3-CH-CH3|CH3

Neobutane does not exist! Because butane has only four carbon atoms, in the common nomenclature, the word "positive" means that in addition to the carbon atoms at both ends of the carbon chain in the middle of the skeleton are -CH2 group, the word "iso" means that the middle of the carbon chain skeleton, there are -CH group, and the word "new" means that the carbon chain skeleton, there are -CH group, and the word "iso" means that the carbon chain skeleton. The word "new" means that the middle of the carbon chain skeleton, there are carbon atoms that do not contain hydrogen atoms, in this case, there are only four carbons in the skeleton to make the chain to have a carbon that does not contain hydrogen is not possible.