This is documentation for Mathematica 7, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.2)

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, ..., b-1, 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.
  • Integer mathematical function, suitable for both symbolic and numerical manipulation.
Binary representation:
Number of 1s in binary representation:
Number of 1s and 0s:
Number of each digit 1, 2, 3, ..., 0 in 100!:
Plot the number of 1s in the base 2 representation:
Binary representation:
In[1]:=
Click for copyable input
Out[1]=
Number of 1s in binary representation:
In[2]:=
Click for copyable input
Out[2]=
Number of 1s and 0s:
In[3]:=
Click for copyable input
Out[3]=
 
Number of each digit 1, 2, 3, ..., 0 in 100!:
In[1]:=
Click for copyable input
Out[1]=
 
Plot the number of 1s in the base 2 representation:
In[1]:=
Click for copyable input
Out[1]=
Count the number of digits 1 and 2 in ternary representation:
Thue-Morse sequence [more info]:
Number of black cells at step t in the rule 90 cellular automaton (binomial coefficients mod 2):
New in 4