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javaでfor文を使った九九の表を作成

Last updated at Posted at 2024-01-15

1月15日 学んだことのアウトプット

for文の2重ループを使って九九の表を作成していく!!
実行環境はEcllipseを使っています。

ソースコード

package test_java;
public class FORTEST {
    public static void main(String[] args) {
        for (int i = 1; i < 10; i++) {
            for (int j = 1; j < 10; j++) {
                System.out.printf("%3d", i * j);
            }
            System.out.println("\n");
        }
    }
}

実行結果

  1  2  3  4  5  6  7  8  9

  2  4  6  8 10 12 14 16 18

  3  6  9 12 15 18 21 24 27

  4  8 12 16 20 24 28 32 36

  5 10 15 20 25 30 35 40 45

  6 12 18 24 30 36 42 48 54

  7 14 21 28 35 42 49 56 63

  8 16 24 32 40 48 56 64 72

  9 18 27 36 45 54 63 72 81

今回作ったプログラムの良いところはこちら

System.out.printf("%3d",i*j)

このコードによって3文字の間隔で文字が表示されるから九九がきれいに表示されています。

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