BigDecimal.ROUND_DOWN

BigDecimal.ROUND_DOWN is a rounding mode used in the BigDecimal class in Java. It specifies that a number should be rounded down to the nearest digit based on the scale (number of decimal places) of the BigDecimal object.

For example, if a BigDecimal object has a value of 3.456 and a scale of 2, rounding down with the ROUND_DOWN mode would result in a value of 3.45. This means that the third decimal place (6 in this case) is ignored and not rounded up.

This rounding mode is also known as truncation or towards zero, as it simply removes any digits beyond the specified scale without rounding them up or down. It is commonly used in financial calculations where precision is important and rounding errors must be minimized.