Programming Fundamentals/Loops/PowerShell

loops.ps1

# This program demonstrates While, Do, and For loop counting using 
# user-designated start, stop, and increment values.
#
# References:
#     https://en.wikiversity.org/wiki/PowerShell/Loops

function Get-Value($name)
{
    Write-Host $('Enter ' + $name + ' value:')
    [int] $value = Read-Host
    return $value
}

function While-Loop($start, $stop, $increment)
{
    Write-Host $('While loop counting from ' + $start + ' to ' + 
        $stop + ' by ' + $increment + ':')
    $count = $start
    While ($count -le $stop) {
        Write-Host $count
        $count = $count + $increment
    }
}

function Do-Loop($start, $stop, $increment)
{
    Write-Host $('Do loop counting from ' + $start + ' to ' + 
        $stop + ' by ' + $increment + ':')
    $count = $start
    Do {
        Write-Host $count
        $count = $count + $increment
    } While ($count -le $stop);
}

function For-Loop($start, $stop, $increment)
{
    Write-Host $('For loop counting from ' + $start + ' to ' + 
        $stop + ' by ' + $increment + ':')
    For ($count = $start; $count -le $stop; $count += $increment) {
        Write-Host $count
    }
}

function Main() 
{
    $start = Get-Value 'starting'
    $stop = Get-Value 'ending'
    $increment = Get-Value 'increment'
    
    While-Loop $start $stop $increment
    Do-Loop $start $stop $increment
    For-Loop $start $stop $increment
}

Main

Try It

Copy and paste the code above into one of the following free online development environments or use your own PowerShell compiler / interpreter / IDE.

Online

• There are some options, but none are fully functional at this time.

Windows

• Microsoft:Starting Windows PowerShell

macOS / Linux

• HowToGeek: How to Install Microsoft PowerShell on Linux or OS X

See Also

• Microsoft: Getting Started with PowerShell
• PowerShell

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