Function Syntax

In C++, functions allow us to group a set of statements together and execute them whenever we need to. They provide modularity and reusability to our code.

Here's an example of a function in C++:

1#include <iostream>
2using namespace std;
3
4// Function declaration
5int multiply(int a, int b);
6
7int main() {
8  // Function call
9  int result = multiply(5, 3);
10
11  // Print the result
12  cout << "The result is: " << result << endl;
13
14  return 0;
15}
16
17// Function definition
18int multiply(int a, int b) {
19  return a * b;
20}

In this example:

• We declare a function multiply that takes two integer parameters a and b and returns their product.
• Inside the main function, we call the multiply function with arguments 5 and 3 and store the result in the result variable.
• Finally, we print the result using the cout object.

The output of this program would be:

1The result is: 15

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#include <iostream>

using namespace std;

​

// Function declaration

int multiply(int a, int b);

​

int main() {

  // Function call

  int result = multiply(5, 3);

​

  // Print the result

  cout << "The result is: " << result << endl;

​

  return 0;

}

​

// Function definition

int multiply(int a, int b) {

  return a * b;

}