Chang variable value in Function

i have $a defined in function a,  $b defined in function b , $c defined in main

in functions, i can use $script:c make change in $c. cannot use $script:a in function b make change in $a

any way that? thanks

function a() { $a = 1; $script:c = 4; b }

function b() { $b = 2; $script:a = 5 ? }

$c = 3

as long function called function b (as done in example), can using numbered scope.  scope 1 immediate parent scope.  however, need use set-variable command instead of $variable syntax make work.  here's modification of sample code demonstrate this:

function functiona {     $a = 1     functionb     $script:c = $a }  function functionb {     $b = 2     set-variable -scope 1 -name -value $b }  $c = 3 functiona  $c

in general, it's cleaner pass values in functions arguments, , out on output stream (or via [ref] parameters), rather modifying variables in parent scope directly.

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