迭代多维数组并检索单个值和数组值

# 定义一个二维数组
matrix = [
    [1, 2, 3],
    [4, 5, 6],
    [7, 8, 9]
]

# 迭代二维数组并打印每个元素
for row in matrix:
    for element in row:
        print(element)

# 检索特定值
target_value = 5
found = False
for i, row in enumerate(matrix):
    if target_value in row:
        found = True
        print(f"Value {target_value} found at position ({i}, {row.index(target_value)})")
        break

if not found:
    print(f"Value {target_value} not found")

// 定义一个二维数组
const matrix = [
    [1, 2, 3],
    [4, 5, 6],
    [7, 8, 9]
];

// 迭代二维数组并打印每个元素
for (let i = 0; i < matrix.length; i++) {
    for (let j = 0; j < matrix[i].length; j++) {
        console.log(matrix[i][j]);
    }
}

// 检索特定值
const targetValue = 5;
let found = false;
for (let i = 0; i < matrix.length; i++) {
    if (matrix[i].includes(targetValue)) {
        found = true;
        console.log(`Value ${targetValue} found at position (${i}, ${matrix[i].indexOf(targetValue)})`);
        break;
    }
}

if (!found) {
    console.log(`Value ${targetValue} not found`);
}

# Python 示例
for i in range(len(matrix)):
    for j in range(len(matrix[i])):
        print(matrix[i][j])

import numpy as np

# 使用NumPy数组
matrix_np = np.array(matrix)
print(matrix_np)