PHP
<body>
<?php
$score=79;
if($score<49){
echo 'grade 0';
}else if($score<54){
echo'grade 1';
}else if($score<59){
echo'grade 1.5';
}else if($score<64){
echo'grade 2';
}else if($score<69){
echo'grade 2.5';
}else if($score<74){
echo'grade 3';
}else if($score<79){
echo'grade 3.5';
}else{echo 'grade4';}
?>
</body>
</html>
