C++ isxdigit usage examples In C++
https://docs.vultr.com/cpp/standard-library/cctype/isxdigit
C++ isxdigit usage examples In C++, the isxdigit() function from the <cctype> library checks if a character is a valid hexadecimal digit (0-9, A-F, a-f).This function is useful in data validation scenarios, such as verifying hexadecimal input for color codes, cryptographic keys, or memory addresses in C++ programs.
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