Example: PHP Program to Find Grade of a Student using Nested If-else

<?php
// PHP Program to Find Grade of a Student using Nested If-else

// These are the marks of five subjects
$sub_1 = 85;
$sub_2 = 54;
$sub_3 = 74;
$sub_4 = 49;
$sub_5 = 38;

// It will calculate total, average, percentage, and grade
$total = $sub_1 + $sub_2 + $sub_3 + $sub_4 + $sub_5;
$average = $total / 5.0;
$percentage = ($total / 500.0) * 100;

if ($average >= 90)
    $grade = "A";
else {
    if ($average >= 80 && $average < 90)
        $grade = "B";
    else {
        if ($average >= 70 && $average < 80)
            $grade = "C";
        else {
            if ($average >= 60 && $average < 70)
                $grade = "D";
            else
                $grade = "E";
        }
    }
}

// It will print the final output
echo "The Total marks   = " . $total . "/500\n";
echo "The Average marks = " . $average . "\n";
echo "The Percentage    = " . $percentage . "%\n";
echo "The Grade         = '" . $grade . "'\n";

?>