code php

<?php
 $score=69;
if($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';}
?>