String Length
To get the length of a string, use the length() function:
Example
string txt = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
cout << "The length of the txt string is: " << txt.length();Tip
You might see some C++ programs that use the size() function to get the length of a string. This is just an alias of length() . It is completely up to you if you want to use length() or size() :
Example
string txt = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
cout << "The length of the txt string is: " << txt.size();