The data who value does not change or remains fixed is called _____________.

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Constant

Variable

All of the above

Fixed

answer is A.

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Detailed Solution

Constant

Explanation:

Definition: A constant is a data item whose value does not change during the program's execution; it remains fixed and unaltered. This is in contrast to a variable, which can have its value modified during program execution.

Characteristics of Constants:

Immutable: Once defined, the value cannot be changed.
Enhances code readability and maintainability by providing meaningful names to fixed values.
Allows for compile-time and run-time checks to ensure constancy assumptions are not violated.

Conclusion: In programming, a constant is a value which does not change during the execution of a program. It is essential for defining fixed values that should remain unaltered, enhancing code reliability and readability.

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