Untitled

<html>
<head>
<title>program utk mmeriksa suatu nilai (0-100)</title>
</head>
<body>
<form method="post">
Masukan nilai (N) : <input type="text" name="nilai_n"></input><br/>
<input type="submit" name="post"></input>
</form>
<?php
if($_POST['post']){
  $data = $_POST['nilai_n'];
  $n=(int)$data;
  if(($n>=85)&&($n<=100)){
     $nilai = "A";
  }
  else if(($n>=75)&&($n<=84)){
     $nilai = "B";
  }

  else if(($n>=60)&&($n<=74)){
     $nilai = "C";
  }

  else if(($n>=46)&&($n<=59)){
     $nilai = "D";
  }
  else if(($n>=0)&&($n<=45)){
     $nilai = "E";
  }
  else{
     $nilai = "Salah Input";
  }
  printf("<font color='red'><b>Nilai Grade adalah : %s<b/></font>", $nilai);
}
?>
</body>
</html>