The Importance Of Constants In Programming: Improve Robustness, Readability, And Maintenance.

Constant

A term that does not contain a variable.

A constant is a variable or value that does not change throughout the execution of a program. In programming, constants are often used to represent values that have a fixed meaning, such as mathematical or scientific constants, or values that should not be modified, such as configuration settings or program parameters. Constants can be defined using the const keyword, and their values must be known at the time of compilation. Once defined, constants cannot be changed during the execution of the program.

For example, in C++, the mathematical constant Pi can be defined as a constant:

const double Pi = 3.14159265358979323846;

This statement defines the constant Pi to have a value of 3.14159265358979323846, which cannot be modified during the execution of the program. The const keyword ensures that Pi is treated as a constant rather than a variable, preventing accidental assignment or modification.

Constants are useful for making programs more robust, by allowing programmers to define values that should not be changed during program execution. They can also make programs more readable and easier to maintain, by providing named constants that make the program logic easier to understand.

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