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How to use the return keyword in a function in C++

Onyejiaku Theophilus Chidalu

Overview

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 value x to the function.
  • Line 8: We declare the return keyword 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 myfunction and 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 myfunction function with two parameter values, x and y.
  • Line 8: We declare the return keyword.
  • Line 12: We call myfunction and pass arguments to the function. The output is printed to the console.

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function
keyword
c++
communitycreator

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Onyejiaku Theophilus Chidalu
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