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The arithmetic operators take numeric operands and produce numeric results.

`a`+`b`Yields the sum of

`a`and`b`.`a`-`b`Subtracts

`b`from`a`and yields the difference.`a`*`b`Yields the product of

`a`and`b`. If either`a`or`b`is 0, then the result is 0, even if the other operand is missing.`a`/`b`Divides

`a`by`b`and yields the quotient. If`a`is 0, then the result is 0, even if`b`is missing. If`b`is zero, the result is system-missing.`a`**`b`Yields the result of raising

`a`to the power`b`. If`a`is negative and`b`is not an integer, the result is system-missing. The result of`0**0`

is system-missing as well.`-`

`a`Reverses the sign of

`a`.