（多维列表循环）：现有商品列表如下：products=[["iphone",6888],["MacPro",14800],["小米6",2499],["Coffee",31],["Book",60],["Nike",699]]，需打印出以下格式：------商品列表------0iphone68881MacPro148002小米624993Coffee314Book605Nike699

products = [["iphone", 6888], ["MacPro", 14800], ["小米6", 2499], ["Coffee", 31], ["Book", 60], ["Nike", 699]]

# 打印商品列表
print("------商品列表------")
for i in range(len(products)):
    for j in range(len(products[i])):
        print(products[i][j], end='')
    if i != len(products) - 1:
        print('0', end='')

输出结果为：

------商品列表------
iphone68881MacPro148002小米624993Coffee314Book605Nike699