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# C - iscntrl function

## Synopsis:

    #include <stdio.h>

    int iscntrl(int c);

## Description:

The function returns nonzero if c is any of:

    BEL BS CR FF HT NL VT

## Return Value

The function returns nonzero if c is control chracter line new line, back space etc. otherwise this will return zero which will be equivalent to false.

## Example

    #include <stdio.h>

    int main() {

      if( iscntrl( 'a' ) )
      {
         printf( "Character a is not control character\n" );
      }
      if( iscntrl( '\n' ) )
      {
         printf( "Character \n is control chracter\n" );
      }
      return 0;
    }

It will proiduce following result:

    Character \n is control chracter

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