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How to use the return keyword in a function in C++
Onyejiaku Theophilus ChidaluOverview
In this shot, we want to briefly illustrate how the return keyword is used in a function in C++.
What is the return keyword?
The return keyword in C++ returns a value to a function. The return keyword is declared inside a function to return a value from the given function.
Example
#include <iostream>
using namespace std;
// creating a function
int myfunction(int x) {
// declaring the return keyword for the function
return 10 + x;
}
int main() {
cout << myfunction(5);
return 0;
}How to use the return keyword
Explanation
- Line 5: We create a function,
myfunction(), and pass an integer parameter valuexto the function. - Line 8: We declare the
returnkeyword for the function. This tells C++ that the expression right after the keyword should be returned whenever the function is called.
- Line 12: We call
myfunctionand pass an argument,5, to the function. The output is printed to the console.
The return keyword can also be used with two parameters.
Example
#include <iostream>
using namespace std;
// ccreating a function having two parameters
int myFunction(int x, int y) {
// declaring the return keyword
return x + y;
}
int main() {
cout << myFunction(10, 5);
return 0;
}
How to use the return keyword
Explanation
- Line 5: We declare the
myfunctionfunction with two parameter values,xandy. - Line 8: We declare the
returnkeyword. - Line 12: We call
myfunctionand pass arguments to the function. The output is printed to the console.
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