Function isdigit

src/fl/stl/cctype.h:25–27

@brief Check if character is a decimal digit (0-9) @param c The character to check @return true if c is a digit, false otherwise

/// @param c The character to check
/// @return true if c is a digit, false otherwise
inline bool isdigit(char c) FL_NOEXCEPT {
    return c >= '0' && c <= '9';
}

/// @brief Convert character to lowercase
/// @param c The character to convert