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C

iscntrl()


checks whether character is a control character

Syntax:
int iscntrl(int c);


Example:

#include 

int main()
{
   char ch[5] ="abc\a";
   int i = 0;
while(1)
   {
      if(iscntrl(ch[i]))
      {
          printf ( "control character is found at " \
                    "%dth position\n", i+1); 
         break;
      }
      i++;
   }   
   return 0;
}
Output:

control character is found at 4th position


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