C Tutorial/ctype.h/isblank

isblank

Item Value Header file ctype.h Declaration int isblank(int ch); Return returns nonzero if ch is blank. By default, the blank characters are space and horizontal tab.

<source lang="cpp">#include <ctype.h>

 #include <stdio.h>
 int main(void)
 {
   char ch;
   for(;;) {
      ch = getchar();
      if(ch == ".") {
         break;
      }
      if(isblank(ch)){
          printf("%c is a word separator\n", ch);
      }
   }
   return 0;
 }</source>