<?php
$score=70;
if($score < 50){
echo 'grade 0';
}else if($score < 56){
echo 'grade 1';
}else if($score < 60){
echo 'grade 1.5';
}else if($score < 66){
echo 'grade 2';
}else if($score < 70){
echo 'grade 2.5';
}else if($score < 76){
echo 'grade 3';
}else if($score < 80){
echo 'grade 3.5';
}else{echo 'grade 4';}
?>
