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 , , ..., , digits in the base-b representation of n.

DigitCount[n]
gives a list of the numbers of , , ..., , digits in the base-10 representation of n.

DetailsDetails

  • Integer mathematical function, suitable for both symbolic and numerical manipulation.
  • DigitCount[n] is equivalent to DigitCount[n, 10, Mod[Range[10], 10]].

ExamplesExamplesopen allclose all

Basic Examples (3)Basic Examples (3)

Binary representation:

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Number of 1s in binary representation:

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Number of 1s and 0s:

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Number of each digit 1, 2, 3, ..., 0 in 100!:

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Plot the number of 1s in the base-2 representation:

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