<?php $title = 'hello';

$score ='73';

if ($score<50){
echo 'grade 0';
}else if ($score<55){
echo '1';
}else if ($score<60){
echo '1.5';
}else if ($score<65){
echo '2';
}else if ($score<70){
echo '2.5';
}else if ($score<75){
echo '3';
}else if ($score<80){
echo '3.5';}else
echo 'grade 4'

?>
</body>
</html>