Find number of digit in a given number in java ||Java Programming Problem 1

Programming problem solving tutorial in java.
Program 1: Write a program to find a number of digits in a given number.
Input : 4567
Output : 4

[swastiktripathi]

Wow sir thank you I had to subbit my comp. notebook tommorow and your program helped me

[ebrarbutun]

what about zero? zero has one digit but it is not defined in your code

[abhi]

How to count number of digits in a number starting with zero? For example if I enter a number 0123, the count output I must get is 4.