Avoid the use of numerical values or "magic numbers" in code when possible. Appropriately Rather, use appropriately named symbolic constants clarify the intent of the programmer. In addition, if a specific number needs to be changed reassigning a symbolic value constant once is more efficient and less error prone than replacing every instance of specific number in the code.
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When declaring immutable symbolic values, such as ADULT_AGE it is best to use const or enum as explained in DCL00-A. Declare immutable values using const or enum.
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