Question

How to count the numbers with even number of digits in an array with Java

Answer 1

public class MyClass {
    private static int count_even_numbers(int[] arr) {
    	int result = 0;
    	int size = arr.length;
    
    	for (int i = 0; i < size; i++) {
    		int total_digits = (int)(Math.log10(arr[i])) + 1;

    		if (total_digits % 2 == 0) {
    			result++;
    		}
    	}
    
    	return result;
    }
    public static void main(String args[]) {
        int[] array = {564, 90, 7, 1248, 47325, 834921, 1234567};;

        System.out.print(count_even_numbers(array));
    }
}





/*
run:
 
3

*/

 

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