Jul 17, 2009 · The first thing to the left of the "const" is what's constant. If "const" is the thing the farthest to the left, then the first thing to the right of it is what's constant.

Jul 11, 2025 · Const qualifier doesn't affect the pointer in this scenario so the pointer is allowed to point to some other address. The first const keyword can go either side of data type, hence int const* is …

Jul 2, 2023 · C adopted the const qualifier from C++, but unlike in C++, expressions of const-qualified type in C are not constant expressions; they may not be used as case labels or to initialize static and …

Mar 13, 2023 · In C, constant values default to external linkage, so they can appear only in source files. In C++, constant values default to internal linkage, which allows them to appear in header files.

Feb 12, 2025 · To declare a pointer to a const value, use the const keyword before the pointer’s data type: In the above example, ptr points to a const int. Because the data type being pointed to is const, …

Sep 12, 2010 · There is no semantic difference between const T& and T const&; the language treats them as the same type. (The same thing applies to const T* and T const*.) Regarding which you …

While this can be used to declare constants, const in the C family of languages differs from similar constructs in other languages in that it is part of the type, and thus has complicated behavior when …

Simple variables that are constant can be used for the same purposes as enumeration constants, and they are not limited to integers. The constantness of the variable propagates into pointers, too. A …

Jul 2, 2023 · C adopted the const qualifier from C++, but unlike in C++, expressions of const-qualified type in C are not constant expressions ; they may not be used as case labels or to initialize static and …

Nov 1, 2025 · Note: Use const instead of #define for constant values because it provides type safety, better debugging support, and proper scope control, making it more suitable for modern C …