Which method is used to define a variable that should not change value after its initial declaration?

The method used to define a variable that should not change value after its initial declaration involves the use of specific keywords that enforce the immutability of that variable. In many programming languages, const (short for constant) is used in languages like C, C++, and JavaScript to define a variable whose value cannot be altered after being initialized. Similarly, the final keyword in Java serves the same purpose, indicating that once a variable has been assigned, it cannot be reassigned to a different value.

This immutability is vital in programming because it helps prevent accidental changes to critical data, leading to more reliable and maintainable code. Programmers can trust that the variable's value will remain constant throughout the program, which is especially useful for defining key configuration values or constants that are used across different parts of the application.

In contrast, declaring a variable as static pertains to its storage duration and context rather than its mutability. A static variable retains its value between function calls but can still be changed. Defining a variable as immutable typically refers to data structures that do not allow modification after creation, but this is not as universally applied as the specific keywords used in many programming languages. Lastly, setting a variable to null does not establish imm