Character Strings

Character strings are special case of array and array initialization

      char hello1[] = { 'H', 'i' };

• the dimension of hello1 is 2

The above is too tedious, so use double quotes

      char hello2[] = "Hi";

• the dimension of hello2 is 3 (three)

• the characters are `H', `i' and `\0'

• all string functions in C library expect the last character to be `\0'

• one frequently uses pointers to walk through a string

        char hello2[] = "Hi";
        int n = 0;
        char *p;
  
        for ( p = hello2; *p != 0; p++ )  n++;
  
        /* now n == 2 */