How are strings defined in the C language?

In the C language, strings can be defined using character arrays. Strings are made up of a series of characters, with a null character (‘\0’) at the end.

Here are two common ways to define a string:

1. Utilizing an array of characters:
2. str1 is an array of characters with a length of 10, initialized with the string “Hello”. str2 is an array of characters, automatically sized to fit the assigned string “World”.
3. Use character pointers.
4. str3 is a pointer to a character array with the value “Hello World”.

In the first method, the size of the character array can be specified as the length of the string plus one in order to leave space for the null character at the end. In the second method, the character pointer points to the first character of the string constant, and there is no need to specify the size of the array.

It is important to note that strings are stored as character arrays, and characters within the string can be accessed using indexes. On the other hand, character pointers point to the first character of the string and can be used to access characters within the string.

In addition, C language offers many string processing functions (such as strlen, strcpy, strcat, etc.), which can be used for manipulating strings.