NAME
    places - return number of decimal places

SYNOPSIS
    places(x)

TYPES
    x		real

    return	integer

DESCRIPTION
    If x has a finite decimal representation (with nonzero last digit),
    places(x) returns the number of digits after the decimal point in this
    representation; this is the least non-negative integer n for which
    10^n * x is an integer.

    If x does not have a finite decimal representation, places(x) returns -1.

EXAMPLE
    > print places(3), places(0.0123), places(3.70), places(1e-10), places(3/7)
    0 4 1 10 -1

LIMITS
    none

LIBRARY
    long qplaces(NUMBER *x)

SEE ALSO
    digits