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IntegerLength

IntegerLength[n]
gives the number of digits in the base 10 representation of the integer n.
IntegerLength[n, b]
gives the number of digits in the base b representation of n.
  • Integer mathematical function, suitable for both symbolic and numerical manipulation.
EXAMPLESCLOSE ALL
Basic Examples   (2)
Find the number of decimal digits in 123456789:
In[1]:=
Click for copyable input
Out[1]=
 
The number of binary digits in 100!:
In[1]:=
Click for copyable input
Out[1]=
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