How do you use strings in the C programming language?

In the C language, we can use char arrays to represent and manipulate strings. Here are some common string manipulation methods:

1. Declare a string variable.
2. Declare a string variable of length 50.
3. Assigning values to strings.
4. Copy the string constant “Hello World” into the variable str.
5. Input string:
6. Read a string from user input and store it in the variable “str”.
7. String output:
8. Print the string “str” to the screen.
9. Length of the string:
10. Get the length of the string str.
11. String comparison:
12. Compare two strings str1 and str2 and return an integer representing their relative order.
13. String concatenation:
14. Append string str2 to the end of string str1.
15. String searching:
16. char *substr = strstr(str, “search”); // Search for the substring “search” in the string str and return a pointer to the first occurrence.

These are just some basic string manipulation methods, C language also offers many other string processing functions and techniques.