How can you get the first digit in an int (C#)?

Question

In C#, what\'s the best way to get the 1st digit in an int? The method I came up with is to turn the int into a string, find the 1st char of the string, then turn it back to

Answer 1

Very simple (and probably quite fast because it only involves comparisons and one division):

if(i<10)
   firstdigit = i;
else if (i<100)
   firstdigit = i/10;
else if (i<1000)
   firstdigit = i/100;
else if (i<10000)
   firstdigit = i/1000;
else if (i<100000)
   firstdigit = i/10000;
else (etc... all the way up to 1000000000)