String is a sequence of characters or an array of characters. The declaration and definition of the string using an array of chars is similar to declaration and definition of an array of any other data type.
- The constructor of string class will set it to the C-style string, which ends at the ‘\0’.
- size() is consistent with other STL containers (like vector, map, etc.) and length() is consistent with most peoples intuitive notion of character strings like a word, sentence or paragraph. We say a paragraph’ss length not its size, so length() is to make things more readable.
Methods to find length of string
1. Using string::size: The method string::size returns the length of the string, in terms of bytes.
2. Using string::length: The method string::length returns the length of the string, in terms of bytes. Both string::size and string::length are synonyms and return the exact same value.
3. Using C library function strlen() method: The C library function size_t strlen(const char *str) computes the length of the string str up to, but not including the terminating null character.
4. Using while loop: Using the traditional method, To initialize the counter equals 0 and increment the counter from starting of string to end of string (terminating null character).
5. Using for loop: To initialize the counter equals 0 and increment the counter from starting of string to end of string (terminating null character).
Input : "Geeksforgeeks" Output : 13 Input : "Geeksforgeeks\0 345" Output : 13 Input : "Geeksforgeeks \0 345" Output : 14
13 13 13 13 13 13
This article is contributed by Prakhar Agrawal. If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to email@example.com. See your article appearing on the GeeksforGeeks main page and help other Geeks.
Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.
- Different methods to reverse a string in C/C++
- Methods to concatenate string in C/C++ with Examples
- Counts of distinct consecutive sub-string of length two using C++ STL
- Find words which are greater than given length k using stringstream
- string find in C++
- Find indices of all occurrence of one string in other
- Find and print duplicate words in std::vector<string> using STL functions
- Calling virtual methods in constructor/destructor in C++
- Hiding of all overloaded methods with same name in base class
- C++: Methods of code shortening in competitive programming
- Different methods to copy in C++ STL | std::copy(), copy_n(), copy_if(), copy_backwards()
- std::string::append vs std::string::push_back() vs Operator += in C++
- Check if a string can be formed from another string using given constraints
- match_results length() in C++ STL
- Variable Length Arrays in C and C++