Given a number, return the number of closed 'circles' in the base 10 numerical representation.
Note: the number 4 has no circles
8819 -> 5
Interpolating on a string (the ASCII values) is an interesting idea even though the long interpolation string could be reduced by subtracting '0', but at the expense of a "longer" solution.
Sums with Excluded Digits
Is the Point in a Circle?
What number has this problem?
05 - Vector Equations 3
Number of 1s in the Binary Representation of a Number
THE CALCULATOR OF LOVE
Read a Soroban Abacus
Test if a Number is a Palindrome without using any String Operations
Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select: .
You can also select a web site from the following list:
Select the China site (in Chinese or English) for best site performance. Other MathWorks country sites are not optimized for visits from your location.
Contact your local office