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C COMPILER LIBRARY FUNCTION REFERENCE->Detailed Descriptions->isalpha()

Summary

#include <ctype.h>

    
int isalpha(int c);Test for letter ('A'-'Z' or 'a'-'z')

Parameter

c    Integer to be tested


Description

This function tests the integer passed to it to see if it is a letter:
'A'-'Z' or 'a'-'z'.

The ASCII character set is assumed.


Return Value

TRUE (1) is returned if the character is a letter, otherwise FALSE (0) is returned.