Display output in the console:
Write-Host "Hello World"
Variable substitution:
$myvar = " World"
# Displays 'Hello World'
Write-Host "Hello$myvar"
<#
This is how I would
make a block comment
of several lines
#>
Write-Host "Goodbye$myvar"
If/Then/Else:
# This has some problems when the user enters an age less than 10.
# For the sake of learning, enter an age of 10 or higher when prompted.
# Your browser may not show it, but there is a space between $age and -lt
$age = Read-Host "How old are you?"
if ($age -lt 13)
{
Write-Host "Child"
}
elseif ($age -lt 18)
{
Write-Host "Teen"
}
else
{
Write-Host "Adult"
}
Switch (case):
# This has some problems when the user enters an age less than 10.
# For the sake of learning, enter an age of 10 or higher when prompted.
$age = Read-Host "How old are you?"
switch ($age)
{
{$_ -lt 13 }
{
Write-Host "Child"
}
{($_ -lt 18) -and ($_ -gt 12) }
{
Write-Host "Teen"
}
default
{
Write-Host "Adult"
}
}
Arrays:
# Empty array:
$myArray = @()
# Populated array:
$myArray = "baby", "toddler", "child", "teen", "adult"
$collectionOfAges = 0, 4, 13, 18
#Another way to define arrays:
$myArray = @("baby", "toddler", "child", "teen", "adult")
# Interact with arrays:
# child:
$myArray[2]
#
# This will not work because $myArray is a fixed array
# $myArray.Add("senior")
#
# So instead we need a dynamic-sized array.
# Here is how to define one:
$myArray = New-Object System.Collections.ArrayList
$myArray.Add("baby")
$myArray.Add("toddler")
$myArray.Add("child")
$myArray.Add("teen")
$myArray.Add("adult")
$myArray.Add("senior")
# senior:
$myArray[5]
Write-Host "non-adults:"
$myArray[0..2]
Hashes:
$myHash = @{
"ford" = "mustang"
"pontiac" = "solstice"
"chevrolet" = "camaro"
}
# Displays 'mustang'
$myHash["ford"]
# Also displays 'mustang'
$myHash.ford
# Displays 3
$myHash.Count
