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constants - What does const mean in C++? - Stack Overflow int const* const is a const pointer to a const int For whatever unfortunate accident in history, however, it was found reasonable to also allow the top-level const to be written on the left, i e , const int and int const are absolutely equivalent
Const in JavaScript: when to use it and is it necessary? const x = 'const'; const x = 'not-const'; Will give an error: 'constant 'x' has already been defined' I realise that it is not yet standardized across all browsers - but I'm only interested in the context of Node js V8, and I've noticed that certain developers projects seem to favor it heavily when the var keyword could be used to the same effect When is it appropriate to use const in
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
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
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
c++ - Using const in classs functions - Stack Overflow void CL2::const_method() const { x = 3; illegal, can't modify a member in a const object } There is an exception to the above rule by using the mutable modifier, but you should first get good at const correctness before you venture into that territory