Usage of string in the C language

In C language, strings are considered as arrays of characters. There is no built-in string type in C language, so character arrays are used to represent strings.

Here are some common uses of strings in the C programming language:

1. Initializing a string:
2. The first line initializes a string with the value “Hello”, while the second line initializes a character array with the same characters individually.
3. Input string:
4. char str[100];

   printf(“Enter a string:”);

   scanf(“%s”, str); // Read a string from standard input

5. String output:
6. The string is: Hello
   printf(“The string is: %s\n”, str); // Output string
7. Length of the string:
8. char str[] = “Hello”;
   int len = strlen(str); // Get the length of the string
   printf(“The length of the string is: %d\n”, len);
9. Copy string:
10. Copy the string “Hello” from src to dest string.
11. String concatenation:
12. Concatenate the str2 string to the end of the str1 string.
13. String comparison:
14. Compare two strings
    if the result is 0, they are equal
    if the result is less than 0, str1 is less than str2
    if the result is greater than 0, str1 is greater than str2

It is important to note that strings in C language are terminated by a null character ‘\0’ to indicate the end of the string. Therefore, the size of a character array must be large enough to accommodate the length of the string plus an additional null character. String manipulation requires the use of string functions from the C standard library such as strlen, strcpy, strcat, and strcmp.