How to define a variable in PowerShell?

You can use dollar ($) sign to assign a variable name in PowerShell. For example suppose you want to define a new variable named myvar, then use $myvar. If you want to assign a value to the variable, then $<variable_name> = <variable_value>. Please find below quick reference –

$myvar = "hello world"
$a = 10
$b = 6
$myvar                                        ## returns "hello world"
$c = $a + $b; $c                              ## returns 16
$a += $c; $a                                  ## returns 26
$myvar = $null; $myvar                        ## returns empty

$myvar = "hello world"

$a = 10

$b = 6

$myvar ## returns "hello world"

$c = $a + $b; $c ## returns 16

$a += $c; $a ## returns 26

$myvar = $null; $myvar ## returns empty

Tags: FAQ, PowerShell