Technical term in mathematics and computing for the value or expression on which an operator acts. Often used in contrast with 演算子 (operator).
See also: オペランド
The operands of the addition operator are the left-hand and right-hand values.
この式では、被演算子が整数である必要があります。
In this expression, the operands must be integers.
演算子 is the operator that acts on the 被演算子 (operand).
オペランド is the common loanword for operand, used interchangeably with 被演算子 in many contexts.
Compound of 被 (ひ, 'receiving') + 演算子 (えんざんし, 'operator'), literally 'that which is operated upon'. A modern technical coinage.