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入門語句 電腦

$num1 = 1;
$num2 = 1;
//加
$num = $num1 + $num2;//結果:$num = 2
//減
$num = $num1 - $num2;//結果:$num = 0
//乘
$num = $num1 * $num2;//結果:$num = 1
//除
$num = $num1 / $num2;//結果:$num = 1