function inside a loop - powershell

How do I call a function inside loop? I'm trying to run an infinite loop that will run a function(s). I have something like this

#Infinite loop to filter file
while ($true){
    #run this function
    filterFile
}


function filterFile{
   #do filtering of files here
}

function anotherFunction{
    #another function 
}

If it possible how can I achieve it, if not is there other way?