I would like to know if there is any difference in the usage of const between variable and pointer, like in the following:
const int var;
const int *ptr;
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3`var = 42;` is illegal ... `ptr = &var;` is legal... `*ptr = 42;` is illegal – pmg Oct 12 '21 at 06:58
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1The first one says that you can't change `var`, the second one says that you can't change the data that `ptr` points to. – Barmar Oct 12 '21 at 06:59
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1For more fun: [What is the difference between const int*, const int * const, and int const *?](https://stackoverflow.com/questions/1143262/what-is-the-difference-between-const-int-const-int-const-and-int-const) – Retired Ninja Oct 12 '21 at 07:00
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@RetiredNinja Like in pointers is there any difference between const int var, and int const var ? – Thilak Oct 12 '21 at 07:03
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@poorna No, there is not. – Retired Ninja Oct 12 '21 at 07:27