How do I pass parameters to PowerShell scripts? | PowerShell FAQ (2024)

FAQs

How do I pass parameters between PowerShell scripts? ›

To pass multiple parameters you must use the command line syntax that includes the names of the parameters. For example, here is a sample PowerShell script that runs the Get-Service function with two parameters. The parameters are the name of the service(s) and the name of the Computer.

The name of the parameter is preceded by a hyphen ( - ), which signals to PowerShell that the word following the hyphen is a parameter name. The parameter name and value can be separated by a space or a colon character. Some parameters do not require or accept a parameter value.

To provide multiple values to parameters that can accept multiple values, use the array syntax. For example, "-parameter value1,value2,value3".

One way to use PowerShell function parameters in a script is via a parameter name -- this method is called named parameters. When calling a script or function via named parameters, use the entire name of the parameter. For example, perhaps the example param block above is stored in a PowerShell script called foo. ps1.

The first method for passing arguments from a file to a Bash script is to use redirection. In particular, the input redirection operator (<) redirects the contents of the file to the standard input of the Bash script. This way, we can extract the arguments from a file using the read command.

A bash shell script have parameters. These parameters start from $1 to $9. When we pass arguments into the command line interface, a positional parameter is assigned to these arguments through the shell.

Let's take a look at an example: function Greet-User { param ( [Parameter(Mandatory=$true)] [string]$Name ) Write-Output "Hello, $Name!" } In this version of Greet-User , the $Name parameter is mandatory.

The shell allows a command line to contain at least 128 arguments; however, a shell program is restricted to referencing only nine positional parameters, $1 through $9, at a given time.

What is the parameter function in PowerShell? ›

PowerShell uses the parameter value order to associate each parameter value with a parameter in the function. When you use positional parameters, type one or more values after the function name. Positional parameter values are assigned to the $args array variable.

Your batch file can be simpler: @Echo Off Echo Starting Script for MYCompany... PowerShell.exe -ExecutionPolicy Bypass -File ""%~dp0\My-Custom. ps1" -UserExcluded <input for parameter, if needed>" Echo Exiting Script...

Enclose the variable=value clause in parentheses. If the parameter contains any characters treated specially by your operating system (such as parentheses in Windows NT), enclose the entire parameter within double quotes and escape any embedded double quotes to pass them through the operating system.

By default, function arguments are passed by value (so that if the value of the argument within the function is changed, it does not get changed outside of the function).

Parameter passing involves passing input parameters into a module (a function in C and a function and procedure in Pascal) and receiving output parameters back from the module. For example a quadratic equation module requires three parameters to be passed to it, these would be a, b and c.

You can write an entire library of functions and save each to a separate file, then use dot-sourcing to call them from a script. You could even go a step further and dot-source the functions into your PowerShell profile to make them available every time you launch PowerShell.

The easiest way to get input from the user in PowerShell is via the Read-Host cmdlet. This cmdlet prompts the user for input and waits for the user to type a response. It can be used to collect various types of input, such as strings, numbers, and secure strings.

Default parameter sets

When multiple parameter sets are defined, the DefaultParameterSetName keyword of the CmdletBinding attribute specifies the default parameter set. PowerShell uses the default parameter set when it can't determine the parameter set to use based on the information provided to the command.

Splatting is a method of passing a collection of parameter values to a command as a unit. PowerShell associates each value in the collection with a command parameter.