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Windows PowerShell Math Functions

Windows PowerShell System.Math::Static Method

There are no separate math functions in PowerShell.  So when you need to access a maths function such as Round or Sqrt, just call for the System.Math.  Have you ever wondered about the PowerShell double colon (::), then all is revealed, it means a static method.

• PowerShell Math Round
• PowerShell System.Math Truncate
• PowerShell System.Math in Action

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PowerShell System.Math Round

Once you call for [System.Math] PowerShell's double colon (::) introduces the function, in this case Round.

Note 1:  This example rounds to two decimal places.

Note 2:  You could shorten to [Math].

PowerShell System.Math Truncate

Rather than rounding, you could achieve much the same result with truncate.

Note 3:  As an alternative I have used [Math] instead of [System.Math]; the pair seem interchangeable.

Note 4:  Incidentally, 'Round' calculates to the nearest number, which means it will round up.  Whereas Truncate just chops off the decimal places.  Thus:

Round $Num = 49.6814343.  The result is: 50
Truncate $Num = 49.6814343.  The result is: 49

PowerShell System.Math Square Root

Note 5: Observe that there is no need to create an object for the Math class, we simply employ :: before the method.

Square Root and Round, 2 Places

Note 6:  Observe the position of the 2, as in two decimal places.

Note 7:  Check the logic of PowerShell's brackets.

Note 8:  Here [System.Math] has been abbreviated to [Math]

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PowerShell System.Math in Action

Here is an example which works with % CPU time, what System.Math::Round does is remove those confusing decimal places in the CPU value.

Superior Method -AS

If you just want to get the job done (rounding CPU), rather than testing System.Math, then this may be a simpler technique.

Note 9:  The rounding or truncating is controlled by @{Label = ; Expression=}; observe the -as [int] construction.  See more about the PowerShell -AS operator.

Researching Static Properties

The secret of finding more static properties is employ Get-Member with the -static parameter.

Note 10:  Try substituting other objects for .File, for example, Path or DriveInfo.

Note 11:  Other cmdlets have static properties for example,

Summary of PowerShell Math Functions

When you need to access a maths function such as Round or Truncate, just call for the System.Math. PowerShell has no separate math functions.  There is no need to create an object for the Math class, simply employ a double colon (::) before the method.

See more Microsoft PowerShell tutorials

• PowerShell Tutorials  • Methods  • Cmdlets  • PS Snapin  • Profile.ps1  • Exchange 2007

• Command & Expression Mode  • PowerShell pipeline (|)  • PowerShell 'where'  • PowerShell 'Sort'

If you see an error of any kind, do let me know.  Please report any factual mistakes, grammatical errors or broken links, I will be happy to not only to correct the fault, but also to give you credit.

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