| 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. |
#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;
}
q q is a letter w w is a letter q q is a letter .
| 18.3.isblank | ||||
| 18.3.1. | isblank | |||