I have been reading the PHP manual in both Japanese and English and have reached the part about operators.
In the 代数演算子 section they talk about 加算, 減算 etc, and have a table showing all of the 代数演算子 (you can see it here: http://www.php.net/manual/ja/language.operators.arithmetic.php)
In the Japanese version of the manual they describe -$a as 負にする but in the English version they use the word Negation.
I wondered if there was a noun in Japanese to describe this, like there is 加算 to describe Addition.
Since they use the word Negation in the English version I thought maybe 否定 in Japanese, but I'm not sure, so if any one knows of a noun to describe this concept any help would be appreciated.
