C++ allows adding numbers and concatenating strings by adding them. If a number and string are added, an error occurs. The length of a string can be obtained using the length() or size() function, which provide the same result. Individual characters in a string can be accessed or changed by referring to their index number within square brackets, with the first character at index 0.

1. C++
Numbers and
Strings
RAI MASAMUNE

2. Adding Numbers and Strings
If you add two numbers, the result will be a
number:

3. If you add two numbers, the result will be
a number:

4. If you add two strings, the result
will be a string concatenation:

5. If you try to add a number to a
string, an error occurs:

6. C++ String Length
String Length
To get the length of a string, use the length() function:
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():

7. C++ Access Strings
Access Strings
You can access the characters in a string by referring to its index number inside
square brackets [].
This example prints the first character in myString:

8. Access String
Note: String indexes start with 0: [0] is the first character. [1] is the second
character, etc.
This example prints the second character in myString:

9. Change String Characters
To change the value of a specific character in a string, refer to the index number,
and use single quotes: