算術演算子（VB.NET）
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演算子機能例結果+足し算1+23-引き算2-11*掛け算3*412/割り算5/22.5\割り算の商7\23Mod割り算の余り7 Mod 2 1^べき乗3^29…
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2進数を16進数、16進数を2進数に変換する方法（VB.NET）
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2進数→16進数はConvert("1010",2).ToString("X")16進数→2進数はConvert.ToString(Convert.ToInt32("FF",16),2)です。…
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mb_send_mail()で送信メールが文字化けする場合
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日本語のメールを送る場合、ISO-2022-JPでエンコーディングしてから送信する必要があります。mail()ではinternal_e…
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PHPでは変数の前に「$」を付ける。
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変数にはアルファベット、数字、"_"（アンダースコア）が使用できますが、変数名を数字から始める事はでき…
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