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test_variabel3.php
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<!doctype html>
<html>
<head>
<title>Variabel</title>
</head>
<body>
<h1>Perubahan Variabel</h1>
<?php
$first_number = 10;
$second_number = 20;
$third_number = 100;
$sum_total = $first_number + $second_number;
$direct_text = 'Total is = ';
print ($direct_text . $sum_total);
//Version tambah kurang
$sum_total = ($third_number - $second_number) + $first_number;
print ("<br>(100-20)+10 = ".$direct_text . $sum_total);
$sum_total = $third_number - ($second_number + $first_number);
print ("<br>100-(20+10) = ".$direct_text . $sum_total);
// versi multiply perkalian
$first_number = 10;
$second_number = 20;
$sum_total = $second_number * $first_number;
print ("<br> Multiply 20 * 10 = ".$direct_text.$sum_total);
// versi divide bagi
$first_number = 10;
$second_number = 20;
$sum_total = $second_number / $first_number;
print ("<br> Divide 20/10 = ".$direct_text.$sum_total);
$first_number = 10;
$second_number = 20;
$sum_total = $first_number / $second_number;
print ("<br> Divide 10/20 = ".$direct_text.$sum_total);
//versi campuran
$first_number = 10;
$second_number = 20;
$third_number = 100;
$sum_total = $third_number - $second_number / $first_number;
print ("<br> 100 - 20 / 10".$direct_text.$sum_total);
//Version oplosan
$sum_total = $third_number - ($second_number / $first_number);
print ("<br> 100 - (20 / 10)".$direct_text.$sum_total);
//Version oplosan2
$sum_total = ($third_number - $second_number) / $first_number;
print ("<br> (100 - 20) / 10".$direct_text.$sum_total);
//floatval
$first_number = 10.2;
$second_number = 2.5;
$sum_total = $second_number + $first_number;
print ("<br>".$direct_text.$sum_total);
?>
</body>
</html>