C++ String Length

To get the length of a string, you use the .length() or .size() member functions.

Example:


#include <iostream>
#include <string>
using namespace std;

int main() {

    string str = "Hello Friends!";
    // length of the string
    cout << str.length() << "\n";
    
    return 0;
}

Output:

Use size() to get the length of the string.


#include <iostream>
#include <string>
using namespace std;

int main() {

    string str = "Hello Friends!";
    // length of the string
    cout << str.size() << "\n";
    
    return 0;
}

Output:

C++ String Length – Interview Questions

Q 1: How to find string length?

Ans: Using length() or size().

Q 2: Do length() and size() differ?

Ans: No.

Q 3: Does length include null character?

Ans: No.

Q 4: Return type of length()?

Ans: size_t.

Q 5: Can length be zero?

Ans: Yes.