Loops

Loops may be used to iterate through collections, performing an operation against each element in the collection; or to repeat an operation (or series of operations) until a condition is met.

Foreach

The foreach loop executes against each element of a collection using the following notation:

foreach (<element> in <collection>) { 
    <body-statements> 
} 

For example, the foreach loop may be used to iterate through each of the processes returned by Get-Process:

foreach ($process in Get-Process) { 
    Write-Host $process.Name 
}    

If the collection is $null or empty, the body of the loop will not execute.

For

The for loop is typically used to step through a collection using the following notation:

for (<intial>; <exit condition>; <repeat>){ 
    <body-statements>
 } 

Initial represents the state of a variable before the first iteration of the loop. This is normally used to initialize a counter for the loop.

The exit condition must be true as long as...