PHP 忒聊 綴豖 ヶ輛 sqrt (PHP 3, PHP 4) Description Returns the square root of arg. ?php // Precision depends on your precision directive echo sqrt(9); // 3 echo sqrt(10); // 3.16227766...? See also pow(). 綴豖 れ萸 ヶ輛 sinh 奻珨撰 srand