var d = e | | 10; Why is it prompted here that e is not defined;
var e = e | | 10; compared with the above analogy, why is there no indication that e is not defined? How is it different from the one above?
var d = e | | 10; Why is it prompted here that e is not defined;
var e = e | | 10; compared with the above analogy, why is there no indication that e is not defined? How is it different from the one above?
var declaration increases variables, that is,
declare to know in advance.
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