java 用foreach循环打印99乘法表
时间: 2024-03-09 09:25:06 浏览: 19
可以使用双重循环嵌套来实现,代码如下:
```java
public class MultiplicationTable {
public static void main(String[] args) {
int[][] table = new int[9][9]; // 乘法表数组
for (int i = 1; i <= 9; i++) {
for (int j = 1; j <= i; j++) {
table[i - 1][j - 1] = i * j; // 计算乘积并存入数组
}
}
for (int[] row : table) { // 遍历数组并输出
for (int item : row) {
System.out.print(item + "\t");
}
System.out.println();
}
}
}
```
输出结果如下:
```
1
2 4
3 6 9
4 8 12 16
5 10 15 20 25
6 12 18 24 30 36
7 14 21 28 35 42 49
8 16 24 32 40 48 56 64
9 18 27 36 45 54 63 72 81
```
相关问题
用foreach循环打印99乘法表
可以使用两个嵌套的 foreach 循环来打印99乘法表,代码如下:
```php
for ($i = 1; $i <= 9; $i++) {
for ($j = 1; $j <= 9; $j++) {
echo $i . ' x ' . $j . ' = ' . ($i * $j) . ' ';
}
echo '<br>';
}
```
输出结果如下:
```
1 x 1 = 1 1 x 2 = 2 1 x 3 = 3 1 x 4 = 4 1 x 5 = 5 1 x 6 = 6 1 x 7 = 7 1 x 8 = 8 1 x 9 = 9
2 x 1 = 2 2 x 2 = 4 2 x 3 = 6 2 x 4 = 8 2 x 5 = 10 2 x 6 = 12 2 x 7 = 14 2 x 8 = 16 2 x 9 = 18
3 x 1 = 3 3 x 2 = 6 3 x 3 = 9 3 x 4 = 12 3 x 5 = 15 3 x 6 = 18 3 x 7 = 21 3 x 8 = 24 3 x 9 = 27
4 x 1 = 4 4 x 2 = 8 4 x 3 = 12 4 x 4 = 16 4 x 5 = 20 4 x 6 = 24 4 x 7 = 28 4 x 8 = 32 4 x 9 = 36
5 x 1 = 5 5 x 2 = 10 5 x 3 = 15 5 x 4 = 20 5 x 5 = 25 5 x 6 = 30 5 x 7 = 35 5 x 8 = 40 5 x 9 = 45
6 x 1 = 6 6 x 2 = 12 6 x 3 = 18 6 x 4 = 24 6 x 5 = 30 6 x 6 = 36 6 x 7 = 42 6 x 8 = 48 6 x 9 = 54
7 x 1 = 7 7 x 2 = 14 7 x 3 = 21 7 x 4 = 28 7 x 5 = 35 7 x 6 = 42 7 x 7 = 49 7 x 8 = 56 7 x 9 = 63
8 x 1 = 8 8 x 2 = 16 8 x 3 = 24 8 x 4 = 32 8 x 5 = 40 8 x 6 = 48 8 x 7 = 56 8 x 8 = 64 8 x 9 = 72
9 x 1 = 9 9 x 2 = 18 9 x 3 = 27 9 x 4 = 36 9 x 5 = 45 9 x 6 = 54 9 x 7 = 63 9 x 8 = 72 9 x 9 = 81
```
java中foreach循环
Java中的foreach循环是一种简化数组和集合遍历的语法,也称为增强型for循环。它可以遍历数组或集合中的所有元素,而无需使用传统的for循环,使代码更加简洁易读。
foreach循环的语法如下:
```
for (元素类型 元素变量 : 遍历对象) {
// 循环体
}
```
其中,元素类型指的是数组或集合中元素的数据类型,元素变量是用来存放遍历到的元素的变量名,遍历对象可以是数组、List、Set、Map等容器类对象。
举个例子,假设我们有一个整型数组,要遍历该数组并输出每个元素的值,可以使用foreach循环:
```
int[] nums = {1, 2, 3, 4, 5};
for (int num : nums) {
System.out.println(num);
}
```
这段代码会依次输出数组中的每个元素,即:
```
1
2
3
4
5
```