怎么创建一个二维数组
时间: 2024-09-07 21:02:43 浏览: 87
创建一个二维数组通常是在编程中用来存储表格数据的一种数据结构。例如,在Python中,你可以使用列表嵌套列表的方式创建:
```python
# Python示例
rows = 3 # 行数
columns = 4 # 列数
# 创建一个空的二维数组
array_2d = [[0 for _ in range(columns)] for _ in range(rows)]
# 或者直接给它初始化一些值
array_2d = [
[1, 2, 3, 4],
[5, 6, 7, 8],
[9, 10, 11, 12]
]
# 对于动态大小的数组,可以使用numpy库
import numpy as np
array_2d_npy = np.zeros((rows, columns))
```
在JavaScript中,可以这样做:
```javascript
// JavaScript示例
let rows = 3;
let columns = 4;
let array_2d = [];
for (let i = 0; i < rows; i++) {
array_2d[i] = new Array(columns).fill(0);
}
```
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