java打印九九乘法表
时间: 2023-08-09 20:08:20 浏览: 128
### 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:
```java
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:
```java
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。
阅读全文