C Reference Alphabetic Test: isalpha()

The function isalpha() returns a non-zero if its argument is a letter of the alphabet. If it is not a letter of the alphabet, then zero is returned.

isalpha() source code example:


#include<stdio.h>
#include<ctype.h>

int main()
{
	char a;
	scanf( "%c", &a );
	if( isalpha(a) )
		printf( "This is a letter of the alphabet: %c\n", a );
	else
		printf( "This is NOT a letter of the alphabet: %c\n", a );
	return 0;
}

This entry was posted in C Reference ctype.h Functions. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed.