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FAQ.What does the NAN code mean?
Answer:| Nan | Meaning |
| 1 | Invalid square root (negative number, usually) |
| 2 | Invalid addition (indeterminate such as infinity + (-infinity)) |
| 4 | Invalid division (indeterminate such as 0/0) |
| 8 | Invalid multiplication (indeterminate such as 0*infinity) |
| 9 | Invalid modulo such as (a mod 0) |
| 17 | Try to convert invalid string to a number like val("x7") |
| 33 | Invalid argument in a trig function |
| 34 | Invalid argument in an inverse trig function |
| 36 | Invalid argument in a log function |
| 37 | Invalid argument in Pow function |
| 38 | Invalid argument in toolbox financial function |
| 40 | Invalid argument in hyperbolic function |
| 42 | Invalid argument in a gamma function |
