Php Calcuator Cant Find Error Keeps Giving Me Same Output

[Nerock]

Hey guys Im trying to make a calculator but whenever i try to display my output all it does it give me "final Grade is A+" even when the percent is 3% im not sure what im doing wrong. Could someone please help me? I would greatly appreciate it.

<?php
if (isset($_POST['submit']))
{
  $Lab1 = (isset($_POST['Lab1'])) ? $_POST['Lab1'] : '';
  $Lab2 = (isset($_POST['Lab2'])) ? $_POST['Lab2'] : '';
  $Lab3 = (isset($_POST['Lab3'])) ? $_POST['Lab3'] : '';
  $LA1 = (isset($_POST['LA1'])) ? $_POST['LA1'] : '';
  $LA2 = (isset($_POST['LA2'])) ? $_POST['LA2'] : '';
  $LA3 = (isset($_POST['LA3'])) ? $_POST['LA3'] : '';
  $LA4 = (isset($_POST['LA4'])) ? $_POST['LA4'] : '';
  $Quiz1 = (isset($_POST['Quiz1'])) ? $_POST['Quiz1'] : '';
  $Quiz2 = (isset($_POST['Quiz2'])) ? $_POST['Quiz2'] : '';
  $Quiz3 = (isset($_POST['Quiz3'])) ? $_POST['Quiz3'] : '';
  $Quiz4 = (isset($_POST['Quiz4'])) ? $_POST['Quiz4'] : '';
  $Final = (isset($_POST['Final'])) ? $_POST['Final'] : '';




    if (($Lab1 == "") || ($Lab2 =="") || ($Lab3 =="") || ($LA1 =="") || ($LA2 =="") || ($LA3 =="") || ($LA4 =="") || ($Quiz1 =="") || ($Quiz2 =="") || ($Quiz3 =="") || ($Quiz4 =="") || ($Final ==""))
     {
     echo("<font face=\"Tahoma\" size=\"2\" color=\"#FF0000\"><b>You Left an area blank, please try again.</b></font><br>");
     }
    elseif ( ( !ereg("[0-9]",$Lab1) ) || ( !ereg("[0-9]",$Lab2) ) || ( !ereg("[0-9]",$Lab3) ) )
     {
     echo("<font face=\"Tahoma\" size=\"2\" color=\"#FF0000\"><b>Please restrict your input to numbers.</b></font><br>");
     }

else
     {   
     $LabTotal=($Lab1 + $Lab2 + $Lab3)*(.08);
     $LAtotal=($LA1+$LA2+$LA3+$LA4)*(.06);
     $Quiztotal=($Quiz1+$Quiz2+$Quiz3+$Quiz4)*(.2);
     $Finalscore=($Final)*(.36);
     $FinalGrade=($Finalscore+$Quiztotal+$LAtotal+$LabTotal);
  }
}
if ($finalGrade< 100)
 {
  print("your grade is: " . $FinalGrade . "% " . "A+");
 }
 elseif ($FinalGrade<93)
 {
  print("your grade is:" . $FinalGrade . "%" . "A");
 }
 elseif ($FinalGrade<88)
 {
  print("your grade is:" . $FinalGrade . "%" . "B+");
 }
 elseif ($FinalGrade<84)
 {
  print("your grade is:" . $FinalGrade . "%" . "B");
 }
 elseif ($FinalGrade<79)
 {
  print("your grade is:" . $FinalGrade . "%" . "B-");
 }
 elseif ($FinalGrade<76)
 {
  print("your grade is:" . $FinalGrade . "%" . "C+");
 }
 elseif ($FinalGrade<72)
 {
  print("your grade is:" . $FinalGrade . "%" . "C");
 }
 elseif ($FinalGrade<69)
 {
  print("your grade is:" . $FinalGrade . "%" . "C-");
 }
 elseif ($FinalGrade<63)
 {
  print("your grade is:" . $FinalGrade . "%" . "D+");
 }
 elseif ($FinalGrade<59)
 {
  print("your grade is:" . $FinalGrade . "%" . "D");
 }
 elseif ($FinalGrade<54)
 {
  print("your grade is:" . $FinalGrade . "%" . "D-");
 }
 elseif ($FinalGrade<49)
 {
  print("your grade is:" . $FinalGrade . "%" . "F");
 }
?>

[gristoi]

well 3 is less than 100. so it will always stop there. u should use logic like if result is > 93 and <= 100 then its an A+ else if result is > 88 and <=93 its an A

[White_Lily]

A+ = $FinalGrade > 93

A = $FinalGrade > 88 || <= 93

 

etc etc,

 

however:

 

F = $FinalGrade < 49

[Barand]

do the checks in the reverse order starting with < 49 .

[Nerock]

Here's what i did and it worked... Im barely learning so its probably bad but it worked...

 

if ($FinalGrade> 93 and $FinalGrade <=1000)
 {
  print("your grade is: " . $FinalGrade . "% " . "A+");
 }
 elseif ($FinalGrade>88 and $FinalGrade<=93)
 {
  print("your grade is: " . $FinalGrade . "% " . "A");
 }
 elseif ($FinalGrade>84 and $FinalGrade<=88)
 {
  print("your grade is: " . $FinalGrade . "% " . "B+");
 }
 elseif ($FinalGrade>79 and $FinalGrade<=84)
 {
  print("your grade is: " . $FinalGrade . "% " . "B");
 }
 elseif ($FinalGrade>76 and $FinalGrade<=79)
 {
  print("your grade is: " . $FinalGrade . "% " . "B-");
 }
 elseif ($FinalGrade>72 and $FinalGrade <=76)
 {
  print("your grade is: " . $FinalGrade . "% " . "C+");
 }
 elseif ($FinalGrade>69 and $FinalGrade <=72)
 {
  print("your grade is: " . $FinalGrade . "% " . "C");
 }
 elseif ($FinalGrade>63 and $FinalGrade <=69)
 {
  print("your grade is: " . $FinalGrade . "% " . "C-");
 }
 elseif ($FinalGrade>59 and $FinalGrade <=63)
 {
  print("your grade is: " . $FinalGrade . "% " . "D+");
 }
 elseif ($FinalGrade>54 and $FinalGrade<=59)
 {
  print("your grade is: " . $FinalGrade . "% " . "D");
 }
 elseif ($FinalGrade>49 and $FinalGrade<=49)
 {
  print("your grade is: " . $FinalGrade . "% " . "D-");
 }
 elseif ($FinalGrade<49)
 {
  print("your grade is: " . $FinalGrade . "% " . "F");