Write-Host

Reference

Module:: Microsoft.PowerShell.Utility

Writes customized output to a host.

Syntax

Write-Host
     [[-Object] <Object>]
     [-NoNewline]
     [-Separator <Object>]
     [-ForegroundColor <ConsoleColor>]
     [-BackgroundColor <ConsoleColor>]
     [<CommonParameters>]

Description

The Write-Host cmdlet customizes output. You can specify the color of text by using the ForegroundColor parameter, and you can specify the background color by using the BackgroundColor parameter. The Separator parameter lets you specify a string to use to separate displayed objects. The particular result depends on the program that is hosting PowerShell.

Note

Starting in Windows PowerShell 5.0, Write-Host is a wrapper for Write-Information This allows you to use Write-Host to emit output to the information stream. This enables the capture or suppression of data written using Write-Host while preserving backwards compatibility.

The $InformationPreference preference variable and InformationAction common parameter do not affect Write-Host messages. The exception to this rule is -InformationAction Ignore, which effectively suppresses Write-Host output. (see "Example 5")

Examples

Example 1: Write to the console without adding a new line

Write-Host "no newline test " -NoNewline
Write-Host "second string"

no newline test second string

This command displays the string 'no newline test' with the NoNewline parameter.

A second string is written, but it ends up on the same line as the first due to the absence of a newline separating the strings.

Example 2: Write to the console and include a separator

Write-Host (2,4,6,8,10,12) -Separator ", +2= "

2, +2= 4, +2= 6, +2= 8, +2= 10, +2= 12

This command displays the even numbers from two through twelve. The Separator parameter is used to add the string , +2= (comma, space, +, 2, =, space).

Example 3: Write with different text and background colors

Write-Host (2,4,6,8,10,12) -Separator ", -> " -ForegroundColor DarkGreen -BackgroundColor White

2, -> 4, -> 6, -> 8, -> 10, -> 12

This command displays the even numbers from two through twelve. It uses the ForegroundColor parameter to output 'dark green' text and the BackgroundColor parameter to display a 'white' background.

Example 4: Write with different text and background colors

Write-Host "Red on white text." -ForegroundColor red -BackgroundColor white

Red on white text.

This command displays the string "Red on white text." The text is 'red', as defined by the ForegroundColor parameter. The background is 'white', as defined by the BackgroundColor parameter.

Example 5: Suppress output from Write-Host

# The following two statements can be used to effectively suppress output from Write-Host
Write-Host "I won't print" -InformationAction Ignore
Write-Host "I won't print" 6>$null

This command displays the string "Red on white text." The text is 'red', as defined by the ForegroundColor parameter. The background is 'white', as defined by the BackgroundColor parameter.

Parameters

-BackgroundColor

Specifies the background color. There is no default. The acceptable values for this parameter are:

Black
DarkBlue
DarkGreen
DarkCyan
DarkRed
DarkMagenta
DarkYellow
Gray
DarkGray
Blue
Green
Cyan
Red
Magenta
Yellow
White

Type:	ConsoleColor
Accepted values:	Black, DarkBlue, DarkGreen, DarkCyan, DarkRed, DarkMagenta, DarkYellow, Gray, DarkGray, Blue, Green, Cyan, Red, Magenta, Yellow, White
Position:	Named
Default value:	None
Required:	False
Accept pipeline input:	False
Accept wildcard characters:	False

-ForegroundColor

Specifies the text color. There is no default. The acceptable values for this parameter are:

Black
DarkBlue
DarkGreen
DarkCyan
DarkRed
DarkMagenta
DarkYellow
Gray
DarkGray
Blue
Green
Cyan
Red
Magenta
Yellow
White

Type:	ConsoleColor
Accepted values:	Black, DarkBlue, DarkGreen, DarkCyan, DarkRed, DarkMagenta, DarkYellow, Gray, DarkGray, Blue, Green, Cyan, Red, Magenta, Yellow, White
Position:	Named
Default value:	None
Required:	False
Accept pipeline input:	False
Accept wildcard characters:	False

-NoNewline

The string representations of the input objects are concatenated to form the output. No spaces or newlines are inserted between the output strings. No newline is added after the last output string.

Type:	SwitchParameter
Position:	Named
Default value:	None
Required:	False
Accept pipeline input:	False
Accept wildcard characters:	False

-Object

Objects to display in the host.

Type:	Object
Position:	0
Default value:	None
Required:	False
Accept pipeline input:	True
Accept wildcard characters:	False

-Separator

Specifies a separator string to insert between objects displayed by the host.

Type:	Object
Position:	Named
Default value:	None
Required:	False
Accept pipeline input:	False
Accept wildcard characters:	False

Inputs

Object

You can pipe objects to be written to the host.

Outputs

None

Write-Host sends the objects to the host. It does not return any objects. However, the host might display the objects that Write-Host sends to it.