=====isalpha=====
Syntax:

<code>
    #include <cctype>
    int isalpha( int ch );
</code>
The function isalpha() returns non-zero if its argument is a letter of the
alphabet. Otherwise, zero is returned.

<code>
     char c;
     scanf( "%c", &c );
     if( isalpha(c) )
       printf( "You entered a letter of the alphabet\n" );
</code>

Related Topics: [[isalnum]], [[iscntrl]], [[isdigit]], [[isgraph]], [[isprint]], [[ispunct]], [[isspace]], [[isxdigit]]