Expand string without Invoke-Expression

Question

Imagine the following code:

# Script Start
$WelcomeMessage = \"Hello $UserName, today is $($Date.DayOfWeek)\"

..
..
# 100 lines of other functions and what          


        

Answer 1

Embedding variables into strings is not the only way to create dynamic text, the way I would do it is like this:

$WelcomeMessage = 'Hello {0}, today is {1}'

# 100 lines of other functions and what not...

function Greet-User
{
    $Username = Get-UserNameFromSomewhereFancy
    $Date = Get-DateFromSomewhereFancy

    $WelcomeMessage -f $Username, $Date
}