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4. hafta....
İKİ TANIMLI SAYIYI TOPLAR TANIMLI DEĞER YOKSA UYARIR!
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Başlıksız Belge</title>
</head>
<body>
<?php
$a=5;
$b=10;
if(isset($a) && isset($b))
{
echo "iki degisken tanimli<br/>";
echo "Toplam".($a+$b);
}
else
{
echo "değişkenlerin hepsi tanımlı değil";
}
?>
</body>
</html>
-------------------------------------------------------------
Floor zemine geriye yuvarlar 5.1=5 -6.1=-7
ceil yukarı yuvarlar örnek 5.4=6
round ise yakın olan tarafa yuvarlar örnek 5.6=6,5.4=5
pow ise belirtilen değerin belirtilen üssünü hesaplar.
sqrt ise parametre olarak verilen değerin karekökünü heesaplar örnek sqrt(36)=6
max ve min=değerlerin içinden en büyük ve en küçüğü bulur
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