>int i = 0; >// convert from a string >int i = int.Parse("1"); >// convert froma string and don’t throw exceptions >if (int.TryParse("1", out i)) {} >i++; // increment by one >i--; // decrement by one >i += 10; // add 10 >i -= 10; // subtract 10 >i *= 10; // multiply by 10 >i /= 10; // divide by 10 >I believe it was a hint to old time compilers to keep the result of the addition in the register for the next operation, but am not totally sure.