C Program to find whether the entered alphabet a vowel or not

   #include <stdio.h>
  main()
  {
      char ch;
      printf("Enter a character\n");
      scanf("%c", &ch);
      if (ch == \'a\' || ch == \'A\' || ch == \'e\' || ch == \'E\' || ch == \'i\' || ch == \'I\' || ch ==\'o\' || ch==\'O\' || ch == \'u\' || ch == \'U\')
          printf("%c is a vowel.\n", ch);
      else
          printf("%c is not a vowel.\n", ch);
      return 0;
  }