Powershell - What does if($variable) test for? -

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in powershell, if($variable) test for? testing if variable set, null, true, or else?

it tests whether variable true or whether non-boolean variable can coalesced true. example, each of these return false:

$var #uninitialized $var = "" $var = $false $var = 0

each of these return true:

$var = "something" $var = $true $var = 1 #or non-zero number

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