lua 基础语法之 for 循环遍历 三种方式_lua for循环

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for i = 1,10,1 do --初值,终值，步数（正数则每次循环加该数，负数则i减该数），步数可以省略（默认为1）

    print(i*2); --2,4,6,...20

 end

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days = {"Sunday", x = 1, y = 2,"Monday", "Tuesday", "Wednesday",

 "Thursday", "Friday", [20] = "aaa","Saturday"}

 for k,v in pairs(days) do

    print(k,v)//{1,Sunday},{2,Monday},{3,Tuesday},...,{7,Saturday},{x,1},{20,"aaa"}{y,2}

 end

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days = {"Sunday", x = 1, y = 2,"Monday", "Tuesday", "Wednesday",

 "Thursday", "Friday",[20] = "aaa", "Saturday"}

 for k,v in ipairs(days) do

    print(k,v)//{1,Sunday},{2,Monday},{3,Tuesday},...,{7,Saturday}

 end