Calculate the number of digits in an integer
Detailed guide and Python implementation for the 'Calculate the number of digits in an integer' problem.
Problem Statement
Write a function count_digits(n) that takes an integer n and returns the number of digits in its absolute value. For example, both 123 and -123 have 3 digits.
Note: The number 0 has 1 digit.
- •-10^9 <= n <= 10^9
Examples
count_digits(12345)
5
12345 has digits 1, 2, 3, 4, 5 — that's 5 digits.
count_digits(-987)
3
Ignoring the sign, 987 has 3 digits.
count_digits(0)
1
The number 0 has exactly 1 digit.
Need a Hint?
Edge Cases to Watch
- Empty input structures
- Single element inputs
- Large numerical bounds
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