Why do I need to have my functions written first in my PowerShell script?

Question

I have a script that I am utilizing functions to wrap parts of the code that allow me to move through the sections at a specified point. What I have found is that I have to

Answer 1

You can also source your function definitions from a separate file:

Steps-Lib.ps1

# Since this is just function definitions it is safe to source
function Step1 { 
    'Step 1' 
    Step2 
} 
function Step2 { 
    'Step 2' 
    Step3 
} 
function Step3 { 
    'Step 3' 
    'Done!' 
}

Steps.ps1

# This sources the Steps-Lib.ps1 so that the functions are available
. "./Steps-Lib.ps1"

$stepChoice = read-host 'Where would you like to start.'

switch($stepChoice)
{
    1{Step1}
    2{Step2}
    3{Step3}
}