How to add numbers and strings in C++
Onyejiaku Theophilus ChidaluOverview
A string in C++ is used to store text. A string variable is one that contains a collection of characters that are enclosed with double quotes " ".
In C++, we can use the + operator for concatenation and addition.
It is worthy to note that the term string concatenation is used when
stringvariables are joined together or concatenated. Whereas addition is used for when numbers are added.
Addition of numbers
When two number variables are added together, the resulting output is a number.
Code
#include <iostream>
using namespace std;
int main () {
//creating number variables
int x = 5;
int y = 10;
// addition of the number variables
int z = x + y;
cout << z; // this should give 5 + 10 = 15
return 0;
}String concatenation
When two string variables are added or joined, the resulting output is a string concatenation.
Code
#include <iostream>
#include <string>
using namespace std;
int main () {
// creating the strings
string x = "5";
string y = "10";
// string concatenation
string z = x + y;
cout << z; // this should give 510
return 0;
}
Notice that from the code above, the concatenation of two strings is simply the joining of the strings. 5 as a string joined to another string 10 will give 510.
Trying to join or add a string to a number will result in an error.
Code
#include <iostream>
#include <string>
using namespace std;
int main () {
// creating a string variable
string x = "5";
// creating a number variable
int y = 10;
//adding the string and number variables
string z = x + y;
cout << z; // this should give 510
return 0;
}
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Onyejiaku Theophilus ChidaluView all Courses
