RoundingModeType
Specifies a rounding mode used in Decimal operations, as well as DecimalFormatOptions and CurrencyFormatOptions.
'ceiling' | 'floor' | 'down' | 'up' | 'half-even' | 'half-down' | 'half-up'
Values
'ceiling'- Round towards positive infinity
'floor'- Round towards negative infinity
'down'- Round towards zero
'up'- Round away from zero
'half-even'- If digit = 5 and digit to left is odd, round up; if even round down
'half-down'- If digit > 5 round up; otherwise round down
'half-up'- If digit >= 5 round up; otherwise round down
Rounding mode effect
# | ceiling | floor | down | up | half-even | half-down | half-up | # | ||
|---|---|---|---|---|---|---|---|---|---|---|
| -2.0 | -2 | -2 | -2 | -2 | -2 | -2 | -2 | -2.0 | ||
| -1.9 | -1 | -2 | -1 | -2 | -2 | -2 | -2 | -1.9 | ||
| -1.8 | -1 | -2 | -1 | -2 | -2 | -2 | -2 | -1.8 | ||
| -1.7 | -1 | -2 | -1 | -2 | -2 | -2 | -2 | -1.7 | ||
| -1.6 | -1 | -2 | -1 | -2 | -2 | -2 | -2 | -1.6 | ||
| -1.5 | -1 | -2 | -1 | -2 | -2 | -1 | -2 | -1.5 | ||
| -1.4 | -1 | -2 | -1 | -2 | -1 | -1 | -1 | -1.4 | ||
| -1.3 | -1 | -2 | -1 | -2 | -1 | -1 | -1 | -1.3 | ||
| -1.2 | -1 | -2 | -1 | -2 | -1 | -1 | -1 | -1.2 | ||
| -1.1 | -1 | -2 | -1 | -2 | -1 | -1 | -1 | -1.1 | ||
| -1.0 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1.0 | ||
| -0.9 | 0 | -1 | 0 | -1 | -1 | -1 | -1 | -0.9 | ||
| -0.8 | 0 | -1 | 0 | -1 | -1 | -1 | -1 | -0.8 | ||
| -0.7 | 0 | -1 | 0 | -1 | -1 | -1 | -1 | -0.7 | ||
| -0.6 | 0 | -1 | 0 | -1 | -1 | -1 | -1 | -0.6 | ||
| -0.5 | 0 | -1 | 0 | -1 | 0 | 0 | -1 | -0.5 | ||
| -0.4 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | -0.4 | ||
| -0.3 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | -0.3 | ||
| -0.2 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | -0.2 | ||
| -0.1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | -0.1 | ||
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| 0.1 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0.1 | ||
| 0.2 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0.2 | ||
| 0.3 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0.3 | ||
| 0.4 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0.4 | ||
| 0.5 | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 0.5 | ||
| 0.6 | 1 | 0 | 0 | 1 | 1 | 1 | 1 | 0.6 | ||
| 0.7 | 1 | 0 | 0 | 1 | 1 | 1 | 1 | 0.7 | ||
| 0.8 | 1 | 0 | 0 | 1 | 1 | 1 | 1 | 0.8 | ||
| 0.9 | 1 | 0 | 0 | 1 | 1 | 1 | 1 | 0.9 | ||
| 1.0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1.0 | ||
| 1.1 | 2 | 1 | 1 | 2 | 1 | 1 | 1 | 1.1 | ||
| 1.2 | 2 | 1 | 1 | 2 | 1 | 1 | 1 | 1.2 | ||
| 1.3 | 2 | 1 | 1 | 2 | 1 | 1 | 1 | 1.3 | ||
| 1.4 | 2 | 1 | 1 | 2 | 1 | 1 | 1 | 1.4 | ||
| 1.5 | 2 | 1 | 1 | 2 | 2 | 1 | 2 | 1.5 | ||
| 1.6 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1.6 | ||
| 1.7 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1.7 | ||
| 1.8 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1.8 | ||
| 1.9 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1.9 | ||
| 2.0 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2.0 |