[1 数组的计算](1%E6%95%B0%E7%BB%84%E7%9A%84%E8%AE%A1%E7%AE%97.md) [2 for循环遍历索引数组](2for%E5%BE%AA%E7%8E%AF%E9%81%8D%E5%8E%86%E7%B4%A2%E5%BC%95%E6%95%B0%E7%BB%84.md) [3 foreach遍历关联数组](3foreach%E9%81%8D%E5%8E%86%E5%85%B3%E8%81%94%E6%95%B0%E7%BB%84.md) [4 list、each函数遍历数组](4list%E3%80%81each%E5%87%BD%E6%95%B0%E9%81%8D%E5%8E%86%E6%95%B0%E7%BB%84.md) [5 常用操作数组函数](5%E5%B8%B8%E7%94%A8%E6%93%8D%E4%BD%9C%E6%95%B0%E7%BB%84%E5%87%BD%E6%95%B0.md)