Hello! I am trying to make a final grade using php function. I have the $totalweightedvalue outside of the function, and I am using this function syntax for the letter grade.

function finalgrade(){

global $totalweightedvalue;

$lettergrade = (($totalweightedvalue < 0)?

"NA":

(($$totalweightedvalue <=60 and

$totalweightedvalue >=0)?

"F":

......continue like this then,

return $lettergrade;

My question is, how can I echo this to output "your final grade is ..."

Note: we are not allowed to usean if else statement.

Thank you so much!