Web Reference: Jan 17, 2026 · The const keyword is used to declare read-only entities such as variables, objects, pointers, function parameters, return types, and member functions. A const variable must be initialized at the time of declaration, and once initialized, its value cannot be modified throughout the program. Jan 31, 2014 · A constant pointer is a pointer that cannot change the address its holding. In other words, we can say that once a constant pointer points to a variable then it cannot point to any other variable. 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, the value being pointed to can’t be changed.
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