how to verifty the number of digits in java code example

Example 1: how to get length of integer in java

int length = (int) (Math.log10(number) + 1);

Example 2: len of number in java

Scanner s = new Scanner(System.in);
		int n = s.nextInt();
		
		int length = String.valueOf(n).length();
		System.out.print(length);