What does const mean in return types, in function parameters, and . . . First of all const T is equivalent to T const const int* const is therefore equivalent to int const * const When reading expressions with lots of const tokens and pointers in them, always try to read them from right to left (after applying the transformation above) So in this case the return value is a const pointer to a const int Making the pointer itself const makes no sense here since
Const in JavaScript: when to use it and is it necessary? It then goes on to say: const is going to be defined by ECMAScript 6, but with different semantics Similar to variables declared with the let statement, constants declared with const will be block-scoped If you do use const you're going to have to add in a workaround to support slightly older browsers
How do I best use the const keyword in C? - Stack Overflow I am trying to get a sense of how I should use const in C code First I didn't really bother using it, but then I saw a quite a few examples of const being used throughout Should I make an effort
c++ - What does `const T* const` mean? - Stack Overflow This is a const pointer-to-const T So if T was an int, then array is a pointer to an int that is const in two ways: pointer-to-const: the value that the pointer is pointing to cannot be changed (or pointing to const int) const pointer: the memory address stored in the pointer cannot change This is also the same as T const * const array See wiki on const correctness
Whats the difference between constexpr and const? Here, both constexpr and const are required: constexpr always refers to the expression being declared (here NP), while const refers to int (it declares a pointer-to-const) Removing the const would render the expression illegal (because (a) a pointer to a non-const object cannot be a constant expression, and (b) N is in-fact a pointer-to