Question

I wrote this:

void blah(int num)
{
    int numOfDigits = Math.log10(num);
    int arr[] = new int[numOfDigits + 1];
    for(int i = numOfDigits; i>0; i--)
    {
        arr[i] = num%10;
        num = num/10;
    }
}

But I thought there must be a more elegant way of doing this. Is there?

Answer 1

If you’re happy with Strings, you could do this:

String[] arr = Integer.toString(num).split("(?<=\\d)");

If you want to go from this to int[]:

int[] arrint = new int[arr.length];
for (int i = 0; i < arr.length; i++)
     arrint[i] = Integer.parseInt(arr[i]);