const and nonconst STL Iterators

What is the difference between a ::const_iterator and an ::iterator and where would you use one over the other?


const_iterators don't allow you to change the values that they point to, regular iterators do.

As with all things in C++, always prefer const, unless there's a good reason to use regular iterators (i.e. you want to use the fact that they're not const to change the pointed-to value).

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