# Assign the value 13 to $var then read it$var = 13
$var ## 13 # Assign the value 42 to${a$b} then read it${a$b} = 42${a$b} ## 42$x = 3
$x.GetType().Name$x = "hello world"
$x.GetType().Name ## Int32 ## String # Define$t to be of type [DateTime]
[DateTime]$t = (Get-Date) # Use () to evaluate the cmdlet first$t = "5/23/2016" # Valid conversion from String
$t$t = "hello world" # Error
##
## Monday, May 23, 2016 12:00:00 AM
## Cannot convert value "hello world" to type "System.DateTime".
## (truncated for brevity)
# Example: data validation
[ValidateRange(1, 118)][int]$atomicNumber = 1$atomicNumber = 119 # Error
## The variable cannot be validated because the value 119
## is not a valid value for the atomicNumber variable.
## (truncated for brevity)
# A variable in PowerShell can have a description
-description "Magnesium" -value 12
$Mg$Mg = 13 # Error
## 12
## Cannot overwrite variable Mg because it is read-only
## or constant.
## (truncated for brevity)
# Example: string concatenation
$x = 1$y = 2
Write-Host ("x = " + $x + ", y = " +$y)
## x = 1, y = 2
# Example: formatting a string
Write-Host "x = $x, y =$y"
## x = 1, y = 2
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX