Understanding Function Call by Value in C++

Introduction

In C++, functions can be called by value or by reference. When a function is called by value, the values of the arguments are copied into the function parameters. This means that any changes made to the parameters within the function do not affect the original values of the arguments. In this article, we will focus on understanding the concept of function call by value in C++.

Key Concepts

1. Function Call by Value: In function call by value, the values of the arguments are copied into the function parameters. Any changes made to the parameters within the function do not affect the original values of the arguments.
2. Function Parameters: Parameters are variables declared in the function definition that receive the values of the arguments passed during the function call.
3. Function Arguments: Arguments are the values passed to a function during a function call.

Code Structure

#include<iostream>
using namespace std;
void add(int,int);
int main()
{
	int a,b;
	cout<<"Enter A:";
	cin>>a;
	cout<<"Enter B:";
	cin>>b;
	add(a,b);
        return 0;
}
void add(int a,int b)
{
	int c=a+b;
	cout<<endl<<"Addition is:"<<c;
}

Code Output