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const keyword in c

In C, the const keyword is used to declare variables whose value cannot be changed after they are initialized. It is a way to define constants, which can help prevent accidental modification of variables that should remain constant throughout the program.

Here are some key points about the const keyword in C:

Initialization Requirement: When a variable is declared with the const keyword, it must be initialized at the time of declaration. Otherwise, the compiler will generate an error.

Compiler Enforcement: The compiler enforces the constancy of a const variable. Any attempt to modify the value of a const variable will result in a compile-time error.

Pointers and Const: When used with pointers, the const keyword can be applied to either the pointer itself or the data pointed to by the pointer, or both.

Here are some examples to illustrate the use of the const keyword: