Calculation range and accuracy

The calculation range is $\displaystyle \pm 10^{-99}$ up to $\displaystyle \pm 9.999999999 \times 10^{99}$, and $\displaystyle 0$. A value below 10 to the minus 99 is treated as zero. Within the range, answers are accurate to $\displaystyle \pm 1$ in the last digit. Small errors can build up in long calculations, inside functions such as $\displaystyle y^{x}$, x root, factorial, $\displaystyle e^{x}$, and LN, and near points where a function jumps or turns.

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