Numbers and Strings

Adding Numbers and Strings

Warning: WARNING! C++ uses the + operator for both addition and concatenation. Numbers are added. Strings are concatenated.

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

Example

int x = 10;
int y = 20;
int z = x + y;      // z will be 30 (an integer)

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

Example

string x = "10";
string y = "20";
string z = x + y;   // z will be 1020 (a string)

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

Example

string x = "10";
int y = 20;
string z = x + y;