 ## MUME Help

Index: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

# CALCULATOR

The Calculator is a mobile whose only purpose is to help you calculate simple mathematical formulae. If you tell it the formula you need to have evaluated, it will tell you the result back.

Example:

```  > tell calculator 2 + 3 * 4
The Calculator tells you '14'
```
If you feel lazy, ```tell calc``` will work as well.

There is a short help available if you tell it `help` or `?`.

The calculator internally works with double floats, so there's a limit to its precision.

If you're interested in details, here's the syntax it understands:

```  expression = factor | factor `+` expression | factor `-` expression
factor     = unary | unary `*` factor | unary `/` factor | unary `mod` factor
unary      = exp | `-` unary | `+` unary | function unary
exp        = atom | atom `^` unary | atom `**` unary | atom exponent
atom       = number | `(` expression `)` | `|` expression `|`
| fraction | constant

number     = [0-9]*(\.[0-9]+)?([eE][+-]?[0-9]+)?
fraction   = [0-9]*[¼½¾]         (only shows properly if you have latin-1)
exponent   = [°¹²³]+                           -   "   -
```
The only constants available are `pi`, `e` and `inf` (or `infinity`).

The functions available are `sin`, `cos`, `tan`, `asin`, `acos`, `atan`, `ln`, `exp`, `log` (base 10 logarithm), `floor` (round down), `ceil` (round up), `trunc` (truncate decimals), `round` (round away from zero), and `sqrt`.

The calculator can also factorize numbers:

```  > `tell calculator factor 4711`
The Calculator tells you 'The prime factors of 4711 are 7 and 673.'
```
 See also: CONVERTER

Generated on Fri Nov 27 18:32:45 2020