C isblank function checks if a character is a blank or not

Syntax

C isblank function has the following syntax.

Header

C isblank function is from header file ctype.h.

Description

C isblank function returns nonzero if ch is blank. By default, the blank characters are space and horizontal tab.

Example

The following code uses C isblank function to check if a character is a blank character. It reads the character by using the function getchar();

#include <ctype.h>
#include <stdio.h>
/*  ww w  .  j  ava 2  s  . c o m*/
int main(void)
{
  char ch;

  for(;;) {
     ch = getchar();
     if(ch == '.') {
        break;
     }
     if(isblank(ch)){
         printf("%c is a word separator\n", ch);
     }
  }

  return 0;
}

The code above generates the following result.