Java 打印九九乘法表

Java打印九九乘法表可以使用双重循环来实现。具体实现方法如下：

for(int i=1;i<=9;i++){
    for(int j=1;j<=i;j++){
        System.out.print(j+"*"+i+"="+(i*j)+"\t");
    }
    System.out.println();
}

其中，外层循环控制行数，内层循环控制列数。在内层循环中，使用`System.out.print()`方法打印每个乘法表达式，使用`\t`实现对齐。在内层循环结束后，使用`System.out.println()`方法换行。

相关问题

java打印九九乘法表

### 回答1：
Sure, here's the code to print the multiplication table in Java:

for (int i = 1; i <= 9; i++) {
    for (int j = 1; j <= i; j++) {
        System.out.print(j + " x " + i + " = " + (i*j) + "\t");
    }
    System.out.println();
}

This will output the multiplication table from 1x1 to 9x9.

### 回答2：
要使用Java打印九九乘法表，可以使用嵌套循环来实现。以下是一个示例代码：

public class MultiplicationTable {
    public static void main(String[] args) {
        // 打印九九乘法表
        for (int i = 1; i <= 9; i++) {
            for (int j = 1; j <= i; j++) {
                // 计算并打印乘法结果
                System.out.print(j + " * " + i + " = " + (i * j) + "\t");
            }
            System.out.println(); // 换行
        }
    }
}

在上面的代码中，我们使用两个循环，外部循环控制行数，内部循环控制每行的列数。内部循环的范围在每行都不同，因为我们只需要打印左上三角部分，同时可以利用对称性进行优化。内部循环中，我们计算并打印乘法结果。最后，我们在每行循环结束后打印一个换行符。

运行该程序，就会输出如下的九九乘法表：

1 * 1 = 1
1 * 2 = 2 2 * 2 = 4
1 * 3 = 3 2 * 3 = 6 3 * 3 = 9
1 * 4 = 4 2 * 4 = 8 3 * 4 = 12 4 * 4 = 16
1 * 5 = 5 2 * 5 = 10 3 * 5 = 15 4 * 5 = 20 5 * 5 = 25
1 * 6 = 6 2 * 6 = 12 3 * 6 = 18 4 * 6 = 24 5 * 6 = 30 6 * 6 = 36
1 * 7 = 7 2 * 7 = 14 3 * 7 = 21 4 * 7 = 28 5 * 7 = 35 6 * 7 = 42 7 * 7 = 49
1 * 8 = 8 2 * 8 = 16 3 * 8 = 24 4 * 8 = 32 5 * 8 = 40 6 * 8 = 48 7 * 8 = 56 8 * 8 = 64
1 * 9 = 9 2 * 9 = 18 3 * 9 = 27 4 * 9 = 36 5 * 9 = 45 6 * 9 = 54 7 * 9 = 63 8 * 9 = 72 9 * 9 = 81

### 回答3：
Java打印九九乘法表的程序可以使用嵌套循环来实现。以下是一个示例程序：

public class MultiplicationTable {
    public static void main(String[] args) {
        // 使用两层循环打印九九乘法表
        for (int i = 1; i <= 9; i++) {
            for (int j = 1; j <= i; j++) {
                System.out.print(j + " * " + i + " = " + (j * i) + "\t");
            }
            System.out.println();
        }
    }
}

运行以上程序，将会输出以下结果：

1 * 1 = 1	
1 * 2 = 2	2 * 2 = 4	
1 * 3 = 3	2 * 3 = 6	3 * 3 = 9	
1 * 4 = 4	2 * 4 = 8	3 * 4 = 12	4 * 4 = 16	
1 * 5 = 5	2 * 5 = 10	3 * 5 = 15	4 * 5 = 20	5 * 5 = 25	
1 * 6 = 6	2 * 6 = 12	3 * 6 = 18	4 * 6 = 24	5 * 6 = 30	6 * 6 = 36	
1 * 7 = 7	2 * 7 = 14	3 * 7 = 21	4 * 7 = 28	5 * 7 = 35	6 * 7 = 42	7 * 7 = 49	
1 * 8 = 8	2 * 8 = 16	3 * 8 = 24	4 * 8 = 32	5 * 8 = 40	6 * 8 = 48	7 * 8 = 56	8 * 8 = 64	
1 * 9 = 9	2 * 9 = 18	3 * 9 = 27	4 * 9 = 36	5 * 9 = 45	6 * 9 = 54	7 * 9 = 63	8 * 9 = 72	9 * 9 = 81	

以上程序通过两层嵌套循环，外层循环控制行数，内层循环控制列数，并利用乘法运算符`*`计算出每个乘法表达式的结果，再通过`System.out.print()`打印出来。

Java打印九九乘法表

以下是Java实现九九乘法表的代码：

public class MultiplicationTable {
    public static void main(String[] args) {
        for (int i = 1; i <= 9; i++) {
            for (int j = 1; j <= i; j++) {
                System.out.print(j + " × " + i + " = " + i * j + "\t");
            }
            System.out.println();
        }
    }
}

运行结果：

1 × 1 = 1	
1 × 2 = 2	2 × 2 = 4	
1 × 3 = 3	2 × 3 = 6	3 × 3 = 9	
1 × 4 = 4	2 × 4 = 8	3 × 4 = 12	4 × 4 = 16	
1 × 5 = 5	2 × 5 = 10	3 × 5 = 15	4 × 5 = 20	5 × 5 = 25	
1 × 6 = 6	2 × 6 = 12	3 × 6 = 18	4 × 6 = 24	5 × 6 = 30	6 × 6 = 36	
1 × 7 = 7	2 × 7 = 14	3 × 7 = 21	4 × 7 = 28	5 × 7 = 35	6 × 7 = 42	7 × 7 = 49	
1 × 8 = 8	2 × 8 = 16	3 × 8 = 24	4 × 8 = 32	5 × 8 = 40	6 × 8 = 48	7 × 8 = 56	8 × 8 = 64	
1 × 9 = 9	2 × 9 = 18	3 × 9 = 27	4 × 9 = 36	5 × 9 = 45	6 × 9 = 54	7 × 9 = 63	8 × 9 = 72	9 × 9 = 81