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I have the following PowerShell function that works well for any input except for 1 . If I pass it an input of 1 it will return an array with two elements 1,1 instead of a single element which is itself an array of two elements (1,1) . Any ideas how I can make PowerShell return a jagged array with one element that is itself an array? function getFactorPairs { param($n) $factorPairs = @() $maxDiv = [math]::sqrt($n) write-verbose "Max Divisor: $maxDiv" for($c = 1; $c -le $maxDiv; $c ++) { $o = $n / $c; if($o -eq [math]::floor($o)) { write-debug "Factor Pair: $c, $o" $factorPairs += ,@($c,$o) # comma tells powershell to add defined array as element in existing array instead of adding array elements to existing array } } return $factorPairs } Here is my test and it's output showing the problem. You can see that the first example (1 as input) is returning a length of 2 even though there was only one factor pair found. The second example (6 as input) is working properly and is returning a length of 2 with two factor pairs found. ~» (getFactorPairs 1).length DEBUG: Factor Pair: 1, 1 2 ~» (getFactorPairs 6).length DEBUG: Factor Pair: 1, 6 DEBUG: Factor Pair: 2, 3 2

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