The function giving the fractional (nonintegral) part of a number and defined as

where is the Floor Function.

**References**

Spanier, J. and Oldham, K. B. ``The Integer-Value Int() and Fractional-Value frac() Functions.''
Ch. 9 in *An Atlas of Functions.* Washington, DC: Hemisphere, pp. 71-78, 1987.

© 1996-9

1999-05-26