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C++ Programming/Code/Standard C Library/Functions/isalpha
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isalpha
#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" );
Related topics isalnum - iscntrl - isdigit - isgraph - isprint - ispunct - isspace - isxdigit