noun
adding operator
Technical computing term for an operator that performs addition.
このプログラムでは、加減作用素を使って二つの数値を足し合わせる。
In this program, we use an adding operator to add two numbers together.
Compound of 加減 (addition and subtraction) and 作用素 (operator). The exact derivation is uncertain; it is a technical term used in computing.