script.ps1

echo "List iteration:"
"first", "second", "I'll do it!" | foreach {"The $_ item"}

echo ""
echo "Reading values from a command:"
cat ".\myfile.txt" | foreach {$_}

echo ""
echo "Field separator:"
cat ".\myOtherFile.txt" -Delimiter ":" | foreach {$_.TrimEnd(':')}

echo ""
echo "Iterating over directory contents:"
ls "~" | foreach {
    if ($_.Mode -match "d") {
        echo "$($_.Name) is directory" 
    } else {
        echo "$($_.Name) is file"
    }
}

echo ""
echo "For loop:"
for ($i = 1; $i -le 10; $i++) {
    echo "Number is $i"
}

echo ""
echo "While loop:"
$var1 = 5
while ($var1 -gt 0) {
    echo $var1
    $var1--
}

echo ""
echo "Nested loops:"
for ($i = 1; $i -le 3; $i++) {
    echo "Start ${i}:"
    for($j = 1; $j -le 3; $j++) {
        echo " Inner loop: $j"
    }
}

echo ""
echo "Looping on File Data:"
cat ".\myData.txt" | foreach {
    echo "Values in ${_} -"
    $_ -split ':' | foreach {
        echo " $_"
    }
}

echo ""
echo "Controlling the loop: Break"
for ($i = 1; $i -lt 10; $i++) {
    if ($i -eq 5) {
        break
    }
    echo "Number: $i"
}

echo ""
echo "Controlling the loop: Continue"
for ($i = 1; $i -lt 15; $i++) {
    if ($i -gt 5 -and $i -lt 10) {
        continue
    }
    echo "Iteration number: $i"
}

echo ""
echo "Processing the output of a loop:"
$( for ($i = 1; $i -lt 10; $i++) {
    echo "Number is $i"
}) *>&1 > done.txt
echo "Finished."

$Env:Path -split ';' | foreach {
    echo $_
    ls $_ | foreach {
        if ($_ -like "*.exe") {
            echo " $_"
        }
    }
}