round-down function; truncation function
Computing term for a function that discards fractional parts or lower-order digits, effectively rounding down toward zero or a specified precision.
This calculation software has a round-down function.
Please use the round-down function to discard the decimal places.
切り上げ means rounding up, while 切捨て means rounding down or truncation.
四捨五入 is standard rounding to the nearest value, whereas 切捨て always rounds down.
Compound of 切捨て (kirisute, 'cutting off, discarding') and 機能 (kinō, 'function'). The exact historical derivation is uncertain; the term is a modern computing expression.