isalpha

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isalpha

Syntax:

  #include <cctype>
  int isalpha( int ch );

The function isalpha() returns non-zero if its argument is a letter of the alphabet. Otherwise, zero is returned.

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