0..7 | ForEach

i have several checkboxes on form: $checkbox0, $checkbox1 .. $checkbox7

i tried use 0..7 | foreach access them, $checkbox$_.checked, not working. there way it? thanks.

(get-variable checkbox[0-7]).value.checked

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[string](0..33|%{[char][int](46+("686552495351636652556262185355647068516270555358646562655775 0645570").substring(($_*2),2))})-replace " "

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