PowerShell data types


In the System Namespace, there are structures which allow us to declare variables to be of a certain data type. The list below shows some commonly used ones.

Datatype Comments
Boolean Represents a Boolean value.
Byte Represents an 8-bit unsigned integer.
Char Represents a character as a UTF-16 code unit.
Decimal Represents a decimal number.
Double Represents a double-precision floating-point number.
Int16 Represents a 16-bit signed integer.
Int32 Represents a 32-bit signed integer.
Int64 Represents a 64-bit signed integer.
SByte Represents an 8-bit signed integer.
Single Represents a single-precision floating-point number.
UInt16 Represents a 16-bit unsigned integer.
UInt32 Represents a 32-bit unsigned integer.
UInt64 Represents a 64-bit unsigned integer.
String Represents text as a series of Unicode characters.

This means we can explicitly declare variables to be of a particular data type. For example:


declares variable fred to be a Decimal.

equally, fred could be an Int16:


The numeric data types have static properties which allow us to assign the maximum or minimum value allowed to the variable.

If we execute the command:

$fred | Get-Member -Static -MemberType property;

this shows us that we have a MinValue and a MaxValue:

Name     MemberType Definition
----     ---------- ----------
MaxValue Property   static decimal MaxValue {get;}
MinusOne Property   static decimal MinusOne {get;}
MinValue Property   static decimal MinValue {get;}
One      Property   static decimal One {get;}
Zero     Property   static decimal Zero {get;}

To make use of the minimum and maximum values, execute the command:


If we’re using other data types, then replace Decimal for the data type in question.


System Namespace. The System namespace contains fundamental classes and base classes that define commonly-used value and reference data types, events and event handlers, interfaces, attributes, and processing exceptions.

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