for values of

for values of

(jargon)A common rhetorical maneuver at MIT is to use anyof the canonical random numbers as placeholders forvariables. "The max function takes 42 arguments, forarbitrary values of 42". "There are 69 ways to leave yourlover, for 69 = 50". This is especially likely when thespeaker has uttered a random number and realises that it wasnot recognised as such, but even "non-random" numbers areoccasionally used in this fashion. A related joke is that piequals 3 - for small values of pi and large values of 3.

This usage probably derives from the programming language MAD(Michigan Algorithm Decoder), an ALGOL-like language thatwas the most common choice among mainstream (non-hacker) usersat MIT in the mid-1960s. It had a control structure FORVALUES OF X = 3, 7, 99 DO ... that would repeat the indicatedinstructions for each value in the list (unlike the usual FORthat generates an arithmetic sequence of values). MAD islong extinct, but similar for-constructs still flourish(e.g. in Unix's shell languages).