DigitCount
DigitCount[n, b, d] gives the number of d digits in the base b representation of n.
DigitCount[n, b] gives a list of the numbers of 1, 2, 
, 
, 0 digits in the base b representation of n.
DigitCount[n] gives a list of the numbers of 1, 2, 
, 9, 0 digits in the base 10 representation of n.
DigitCount[n] is equivalent to DigitCount[n, 10, Mod[Range[10],10]].
Integer mathematical function (see Section A.3.10).
See The Mathematica Book on the web: Section 3.2.4.
See also: IntegerDigits, FromDigits, BitAnd, IntegerExponent.
Further Examples
