Mastering Windows PowerShell Scripting - Third Edition

Remainder operator

The remainder operator returns the remainder of the whole-number (integer) division. For example, the result of the following operation is 1:

3 % 2 

The remainder operator can also be used for alternation. That is, performing an action on every second, third, fourth, and so on iteration of a loop.

1..100 | Where-Object { $_ % 5 -eq 0 } | ForEach-Object {    Write-Host $_}

The value will show 5, 10, 15, 20, and so on. Each of those values will have a remainder of when divided by 5.