From LQWiki

Arg is an abbreviation for ‘argument’ (to a function), used so often as to have become a new word (like ‘piano’ from ‘pianoforte’). “The sine function takes 1 arg, but the arc-tangent function can take either 1 or 2 args.”

See Also

• param
• parm
• var

This article is based, in whole or in part, on entry or entries in the Jargon File.