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16 February, 22:33

Assume that x is a char variable has been declared and already given a value. Write an expression whose value is true if and only if x is an hexadecimal (Base 16) digit (0-9 plus A-F or a-f).

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  1. 16 February, 22:56
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    Answer: x in [0-9A-Fa-f]

    Step-by-step explanation:

    Depends upon syntax of your programming language, but you will write either a string comparison or a regex with the character set defined as above
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