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PowerShell: data types

Each PowerShell value has a type.

There are two categories of types:

Special types are:

void cannot be instantiated and is used for the cast operator
null has one instance only (namely: $null)
object from which all other types, except null are derived, either directly or indirectly.

Value types:

Reference types:

string
array
hash table
xml
regex
ref
scriptblock
math (used for constants e, pi and functions like abs(), max(), sin() etc.)
ordered (which is considered a pseudo type)
pscustomobject (which is ony used for conversions)

generic types (which problably would be template types in C++).

description types to describe

The type of a variable can be determined with getType():

$foo = 42
$foo.getType()

See also