</tt> <br /><br /><a name="FN-DEF-BOTH-CASE-P" id="FN-DEF-BOTH-CASE-P"></a>function <tt><strong>BOTH-CASE-P</strong> : (char)</tt> <br /><br /><a name="FN-DEF-DIGIT-CHAR-P" id="FN-DEF-DIGIT-CHAR-P"></a>function <tt><strong>DIGIT-CHAR-P</strong> : (char)</tt> <br /><br /><a name="FN-DEF-ALPHANUMERICP" id="FN-DEF-ALPHANUMERICP"></a>function <tt><strong>ALPHANUMERICP</strong> : (char)</tt> <br /><br /><a name="FN-DEF-CHAR=" id="FN-DEF-CHAR="></a>function <tt><strong>CHAR=</strong> : (char1 char2)</