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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.