42 lines
1.1 KiB
Markdown
42 lines
1.1 KiB
Markdown
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# Arithmetic
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## `+`
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```
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(+ &rest numbers)
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```
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`+` returns the sum of its arguments, skipping any inputs that are not
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ints or floats. If no arguments are given, it returns 0.
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## `-`
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```
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(- number)
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(- number &rest more-numbers)
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```
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If called with one argument, `-` returns the negation of that argument.
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If called with more than one argument, `-` subtracts `more-numbers` from
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`number`, skipping any inputs that are not ints or floats.
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If `number` is not an int or float, `-` returns nil.
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## `*`
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```
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(* &rest numbers)
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```
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`*` returns the product of its arguments, skipping any inputs that are
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not ints or floats. If no arguments are given, it returns 1.
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## `/`
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```
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(/ number &rest more-numbers)
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```
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`/` divides `number` by `more-numbers`, skipping any inputs that are not
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ints or floats. It always returns a float.
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If `number` is not an int or float, `/` returns nil.
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## `int/`
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```
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(int/ number &rest more-numbers)
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```
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`int/` performs integer division, dividing `number` by `more-numbers`,
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skipping any inputs that are not ints or floats, and returning an int.
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If `number` is not an int or float, `int/`returns nil.
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