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October 26, 2015 14:47
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Prime checker for PowerShell.
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| Param($num) | |
| $msg = @("Prime.", "NOT prime.", "Not Applicable.") | |
| $ret = 2 | |
| if ($num -ge 2) { | |
| $ret = 0 | |
| if ($num -gt 3) { | |
| if (($num % 2) -eq 0) { | |
| $ret = 1 | |
| } else { | |
| :loop foreach ($exam in 3..[Math]::Ceiling([Math]::Sqrt($num))) { | |
| if (($num % $exam) -eq 0) { | |
| $ret = 1 | |
| break loop | |
| } | |
| } | |
| } | |
| } | |
| } | |
| $msg[$ret] | |
| exit $ret |
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