PowerShell: create a global variable in a function

Without using scope modifiers, a non-global variable that is used within a function creates the variable for the scope of the function.

Sometimes, there is a requirement to create a (global) variable within a function. This can be achieved by prefixing the variable name with global::

function create-global-var() {

   $global:num = 42
   $global:txt ='Hello world'

}