Also note, writing 00 is fine but do not the leading 0 indicates octal notation so 010 != 10 and 09 is NOT valid 
Aka, don't get into the habit of writing leading zero's if you don't mean octal 
Also note, writing 00 is fine but do not the leading 0 indicates octal notation so 010 != 10 and 09 is NOT valid Aka, don't get into the habit of writing leading zero's if you don't mean octal