C – Call by Value and Call by Reference with Example2 min read

There are two ways in which the argument can be passed through a function in C Programming.

  1. Call by Value
  2. Call by Reference

Call by Value in C.

In this method, the actual argument is copied to the formal parameter of the function. Hence any operation performed on the argument does not affect the actual parameters. By default, C programming uses call by value to pass arguments.

Since the actual parameter is copied to formal parameters, different memory is allocated for both parameters.

Example: Swap the values of two variables in C Programming:

The output of call by Value:


Call by Reference.

Unlike call by value method, here the address of the actual parameter is passed to a formal parameter rather than value. Hence any operation performed on formal parameters affects the value of actual parameters.

The memory allocation for both actual and formal parameters are same in this method.

Example: Swap the values of two variables in C Programming:

The output of call by Reference:


MORE

C Program to search an element in an array using Pointers

A separate function( search_function()) will be created where the array pointer will be declared and the searched element along with the size of an array …

C Program to find the sum of the digits of a number using recursion function

This C program calculates the sum of digits of a given number using recursion. Here’s a concise explanation: Function Definition: sumDigits(int n) This function calculates …

C program to find factorial of a number using Ternary operator with Recursion

Recursion refers to the function calling itself directly or in a cycle. Before we begin, you should have the knowledge of following in C Programming: …

C Program to Add Two Numbers Using Call by Reference

The program takes the two numbers from the user and passes the reference to the function where the sum is calculated. You may go through …

Find the output ab, cd, ef, g for the input a,b,c,d,e,f,g in Javascript and Python

In this tutorial, we will write a program to find a pairs of elements from an array such that for the input [a,b,c,d,e,f,g] we will …

String Pattern Programs in C

In this tutorial, we will write various C pattern programs for String. Before that, you may go through the following topics in C. for loop …