1,for 循环
基本形式:
for variable [, variable ...] in expression [do] code end
do是可以省略的。
直接看小例子就会用了:
for i in 0..5 puts i end 输出: 0,1,2,3,4,5
user=["赵大","钱二","张三","李四"] name=user.length-1 for i in 0..name put usr[i] end 输出:赵大,钱二 张三 李四
2,each循环
基本形式:
(expression).each do |variable[, variable...]| code end
例子:
(0..5).each do |i| puts i end 输出:0 1 2 3 4 5