# 打印九九乘法表
for i in range(1, 10):  # 外层循环控制行
    for j in range(1, i+1):  # 内层循环控制列
        print(f"{j}×{i}={i*j}", end="\t")
    print()  # 换行

// 查找二维数组中的特定元素
const matrix = [
  [1, 2, 3],
  [4, 5, 6],
  [7, 8, 9]
];
const target = 5;
let found = false;

outerLoop:
for (let i = 0; i < matrix.length; i++) {
  for (let j = 0; j < matrix[i].length; j++) {
    if (matrix[i][j] === target) {
      console.log(`Found at position [${i}][${j}]`);
      found = true;
      break outerLoop;  // 使用标签跳出外层循环
    }
  }
}

// 跳过某些迭代的示例
for (int i = 0; i < 10; i++) {
    if (i % 2 == 0) {
        continue;  // 跳过偶数
    }
    System.out.println("奇数: " + i);
    
    if (i > 5) {
        break;  // 当i大于5时终止循环
    }
}

# 优化示例：提前终止不必要的迭代
numbers = [2, 4, 6, 8, 10]
target = 12
found = False

for i in range(len(numbers)):
    if found:  # 如果已经找到，不再继续
        break
    for j in range(i+1, len(numbers)):
        if numbers[i] + numbers[j] == target:
            print(f"Pair found: {numbers[i]}, {numbers[j]}")
            found = True
            break

let counter = 0;
while (someCondition) {
    // 业务逻辑
    
    // 安全措施
    counter++;
    if (counter > 10000) {
        console.log("安全终止循环");
        break;
    }
}

// 正确做法：使用不同的变量名
for (int row = 0; row < rows; row++) {
    for (int col = 0; col < cols; col++) {
        // 处理矩阵元素
    }
}