C++ Locale Library - isalpha

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Description

It checks if character is alphabetic.

Declaration

Following is the declaration for std::isalpha.

C++98

 int isalpha ( int c ); 

C++11

 int isalpha ( int c ); 

Parameters

c − Character to be checked, casted to an int, or EOF.

Return Value

It returns a value different from zero.

Exceptions

No-throw guarantee − this function never throws exceptions.

Example

In below example for std::isalpha.

 #include <stdio.h> #include <ctype.h> int main () { int i=0; char str[]="C++"; while (str[i]) { if (isalpha(str[i])) printf ("character %c is alphabetic\n",str[i]); else printf ("character %c is not alphabetic\n",str[i]); i++; } return 0; } 

The sample output should be like this −

 character C is alphabetic character + is not alphabetic character + is not alphabetic