RoundingPriority

class RoundingPriority

An enum declaring how to resolve conflicts between maximum fraction digits and maximum significant digits.

There are two modes, RELAXED and STRICT:

• RELAXED: Relax one of the two constraints (fraction digits or significant digits) in order to round the number to a higher level of precision.
• STRICT: Enforce both constraints, resulting in the number being rounded to a lower level of precision.

The default settings for compact notation rounding are Max-Fraction = 0 (round to the nearest integer), Max-Significant = 2 (round to 2 significant digits), and priority RELAXED (choose the constraint that results in more digits being displayed).

Conflicting minimum fraction and significant digits are always resolved in the direction that results in more trailing zeros.

Example 1: Consider the number 3.141, with various different settings:

• Max-Fraction = 1: "3.1"
• Max-Significant = 3: "3.14"

The rounding priority determines how to resolve the conflict when both Max-Fraction and Max-Significant are set. With RELAXED, the less-strict setting (the one that causes more digits to be displayed) will be used; Max-Significant wins. With STRICT, the more-strict setting (the one that causes fewer digits to be displayed) will be used; Max-Fraction wins.

Example 2: Consider the number 8317, with various different settings:

• Max-Fraction = 1: "8317"
• Max-Significant = 3: "8320"

Here, RELAXED favors Max-Fraction and STRICT favors Max-Significant. Note that this larger number caused the two modes to favor the opposite result.

Summary

Enum values

enum val RELAXED : NumberFormatter.RoundingPriority

enum val STRICT : NumberFormatter.RoundingPriority