# How units are displayed

By default, exponents on units or dimensions are indicated using Unicode superscripts on macOS and without superscripts on other operating systems. You can set the environment variable UNITFUL_FANCY_EXPONENTS to either true or false to force using or not using the exponents.

Unitful.BracketStyleType
BracketStyle(x)
BracketStyle(typeof(x))

BracketStyle specifies whether the numeric value of a Quantity is printed in brackets (and what kind of brackets). Three styles are defined:

• NoBrackets(): this is the default, for example used for real numbers: 1.2 m
• RoundBrackets(): used for complex numbers: (2.5 + 1.0im) V
• SquareBrackets(): used for Level/Gain: [3 dB] Hz^-1
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Unitful.abbrFunction

abbr(x) provides abbreviations for units or dimensions. Since a method should always be defined for each unit and dimension type, absence of a method for a specific unit or dimension type is likely an error. Consequently, we return ❓ for generic arguments to flag unexpected behavior.

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Unitful.prefixFunction
prefix(x::Unit)

Returns a string representing the SI prefix for the power-of-ten held by this particular unit.

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Base.showMethod
show(io::IO, x::Quantity)

Show a unitful quantity by calling showval on the numeric value, appending a space, and then calling show on a units object U().

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Unitful.showvalFunction
showval(io::IO, x::Number, brackets::Bool=true)

Show the numeric value x of a quantity. Depending on the type of x, the value may be enclosed in brackets (see BracketStyle). If brackets is set to false, the brackets are not printed.

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