noun
carry digit
Technical computing term for the digit that is carried over to the next column during addition.
二進数の加算では、桁上げ数が次のビットに伝播する。
In binary addition, the carry digit propagates to the next bit.
Refers to the carry operation itself, while 桁上げ数 specifically denotes the digit that is carried.
Compound of 桁 (けた, 'digit place') + 上げ (あげ, 'raising') + 数 (すう, 'number'). The term is a straightforward technical coinage for the carry digit in arithmetic.