gwyn@smoke.BRL.MIL (Doug Gwyn) (07/19/89)
In article <20283@adm.BRL.MIL> Leisner.Henr@xerox.com (Marty) writes: >What does NaN mean out of printf? Please direct C language questions to the C newsgroup, not a UNIX group. NaN stands for "Not a Number". In IEEE Std 754/854 floating-point arithmetic, there are a set of bit combinations reserved for representing non-numbers, as well as values for positive and negative infinity. If you haven't arranged your computation correctly, you can easily find one of these odd creatures lurking in a floating-point variable instead of a valid number.