Java Program to Count Total Number of Digits in an Integer.

This java program to Count Total Number of Digits in an Integer. We are using while loop approach.

Here we iterate while loop until the method expression num != 0 is given to 0 (false).
At the first iteration, num will be divided by 10 and its value will be 1234, then the count is incremented to 1.
Now the second iteration, the value of num will be 123 and the count is incremented to 2.
After the third iteration, the value of num will be 12 and the count is incremented to 3.
After the fourth iteration, the value of num will be 1 and the count is incremented to 4.
After the fifth iteration, the value of num will be 0 and the count is incremented to 5.
Then the test expression num!=0 is evaluated to false and the loop terminates.
Now print the Total Number of Digits in an Integer.

				
					public class CountOfDigit {
	public static void main(String[] args) {
		int num = 12345;
		int count = 0;
		while (num != 0) {
			num = num / 10;
			count++;
		}
		System.out.println("Total number of digit: "+count);
	}
}

Output :-
Total number of digit: 5