A constant is a data item whose value cannot be changed during the normal execution of the program. This is in contrast to a variable, which is an identifier for a value that can be modified. Functions are blocks of code that perform a task, and while they can use constants, they are not themselves constants. Data types define the kind of data a variable or constant can hold, but are not themselves constants.
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What is the difference between a constant and a variable in programming?
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