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Call by Value & Call by Reference

Quick Summary & Key Takeaways

  • • Subject Focus: C Language Notes in English (BCA / B.Tech Syllabus)
  • • Core Topic: Call by Value & Call by Reference - General Topics
  • • Overview: Call by Value & Call by Reference in C: In the C language, when we call a function, two main methods can be used: Call by Value and Call by Reference. ...
  • • Key Concepts: Call by value reference, Differences pointers swapping Hindi, Advantages call,Call by value reference, Differences pointers swapping, Advantages call

Call by Value & Call by Reference in C:


In the C language, when we call a function, two main methods can be used: Call by Value and Call by Reference. These two methods determine how parameters are passed to a function.

Call by Value:
In this method, only the value of the variable is passed to the function, not the actual memory address of the variable. This means that a copy of the variable's value is made inside the function. Any changes made to the variable inside the function do not affect the original variable's value.
Advantages: Simplicity, data safety, and less chance of conflicts.
Disadvantages: Higher memory consumption and not effective when the original value needs to be changed.

Call by Reference:
In this method, the actual memory address of the variable is passed to the function, not just its value. This means that the original value of the variable can be changed inside the function. This method does not require creating a copy of the variable.
Advantages: Ability to change the original data, memory savings, and effectiveness when modification is needed.
Disadvantages: Complexity, reduced data safety, and risk of unexpected changes.

A comparison table is included to highlight the key differences between the two methods.

Frequently Asked Questions (FAQs)

Call by Value & Call by Reference in C: In the C language, when we call a function, two main methods can be used: Call by Value and Call by Reference.
Understanding Call by Value & Call by Reference is fundamental to mastering C Language Notes in English. It covers crucial concepts, solved problems, and revision points essential for academic and entrance exam success.
You can read free solved examples, detailed explanations, and key formulas for Call by Value & Call by Reference directly on the NotesMedia website or by downloading the NotesMedia App.

In this Chapter

Call by Value & Call by Reference
What is an Array & Types of Arrays
What is Memory Allocation and its Types
Introduction to C
Variables in C
Flowcharts in C
First Program in C
malloc() & calloc() in C
Control Statements in C
Algorithms in C
Tokens & Keywords in C
File Handling in C
Operators in C
Parameter & Argument Passing in C
Pointers in C
Debugging in C
Recursion in C
Expressions in C
Unions in C
Header Files in C