One of the core building blocks for any computer language. For loops iterate in a loop (repeat) until a condition is met, or continues forever, who am I to judge! The basics of a for loop is:
for ($x = 0; $x -lt $array.Count; $x++) {
# Repeat code in this block
}
# Another way to look at it:
for (<# $this #>; <# while $this is less/equal/greater than $that #>; <# increase/decrease $this by 1 #>){
# Repeat code in this block
}
Try it at home!
This for loop runs 10 times since $array is set to 10. $i starts at 1 , while $i is less than or equal to $array, increase $i by 1 for each loop of the script block. I put a conditional if statement inside the script block just for fun. If $i equals the value of $array (aka the last time this block will run), then print an encouraging message followed by a pleasant roflcopter. If it isn’t the last loop, then print how many times it has run. Once it is finished, print “Finished” in the console.
$array = 10
for ($i = 1; $i -le $array; $i++) {
if ($i -eq $array) {
Write-Host "Congratulations! Final lap!"
Write-Host @"
_^___
L __/ [] \
LOL===__ \
L \________]
I I
--------/
"@ -ForegroundColor White -BackgroundColor Black
}
else {
Write-Host "This ran $i time(s)!"
}
}
Write-Host "Finished"which will output:
This ran 1 time(s)!
This ran 2 time(s)!
This ran 3 time(s)!
This ran 4 time(s)!
This ran 5 time(s)!
This ran 6 time(s)!
This ran 7 time(s)!
This ran 8 time(s)!
This ran 9 time(s)!
Congratulations! Final lap!
_^___
L __/ [] \
LOL===__ \
L \________]
I I
--------/
Finishedfor loops are great and have so many great uses when writing PowerShell scripts. Pretty neat!
