What is string manipulation?

String manipulation refers to the process of modifying, analyzing, or handling strings (sequences of characters) in programming. This includes a variety of operations that allow you to work with text data effectively. Common string manipulation tasks include:

1. Concatenation: Joining two or more strings together.
2. Substring Extraction: Retrieving a portion of a string.
3. Length Calculation: Determining the number of characters in a string.
4. Character Replacement: Changing specific characters within a string.
5. Searching: Finding the position of a substring within a string.
6. Trimming: Removing whitespace or specific characters from the beginning and end of a string.
7. Case Conversion: Changing the case of characters (e.g., from lowercase to uppercase).

Example in C:

#include <stdio.h>
#include <string.h>

int main() {
    char str1[20] = "Hello";
    char str2[20] = "World";

    // Concatenation
    strcat(str1, " "); // Add a space
    strcat(str1, str2); // str1 is now "Hello World"

    // Length
    printf("Length: %zu\n", strlen(str1)); // Output: Length: 11

    // Substring (using pointer arithmetic)
    char *sub = str1 + 6; // Points to "World"
    printf("Substring: %s\n", sub); // Output: Substring: World

    return 0;
}

In this example, various string manipulation operations are demonstrated. If you have more questions about specific string operations or need examples in another programming language, feel free to ask!