Check a char: is it a control letter : Char Validation « Data Type « C / ANSI-C

1. C / ANSI-C
2. Data Type
3. Char Validation

Check a char: is it a control letter

#include <ctype.h>
#include <stdio.h>

int main(void)
{
  char ch;

  for(;;) {
    ch = getchar();
    if(ch=='.') 
        break;
    if(iscntrl(ch))
      printf("%c is a control character\n", ch);
  }

  return 0;
}
           
       

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