In honor of Carl Friedrich Gauss I wrote a sub that sums every DIGIT (not every integer) between zero and the integer you choose. Let's take the integer 13 for example:
1+2+3+4+5+6+7+8+9+'1+0'+'1+1'+'1+2'+'1+3' = 55
or...
1+2+3...+999,999+1,000,000 = 27,000,001
Give it a try! Also, let me...