- let具有作用域属性
for i in [1,2,3,4,5]:
var i = i
这样相当于直接输出 i = 5
for i in [1,2,3,4,5]:
let i = i
相当于
i = 1
i = 2
i = 3
i = 4
i = 5
分别执行了五次，分别是各个的作用域，不会被覆盖
© 本文著作权归作者所有，转载前请务必署名
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for i in [1,2,3,4,5]:
var i = i
这样相当于直接输出 i = 5
for i in [1,2,3,4,5]:
let i = i
相当于
i = 1
i = 2
i = 3
i = 4
i = 5
分别执行了五次，分别是各个的作用域，不会被覆盖
© 本文著作权归作者所有，转载前请务必署名
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