C Language Basic to Advance Course > Working with User Defined Functions

Scope of a Variable

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In programming, a scope is a section of the programme where a defined variable can exist but cannot be accessible beyond that variable. In the C programming language, variables can be declared in three places: inside a function or a block (local variables), outside a function or a block (global variables), and outside a function or a block (global variables).

In simple terms, a variable's scope is its duration in the programme. This means that a variable's scope is the entire program's block of code where the variable is declared, used, and updated.

Variables in C have a similar idea. The accessibility of a variable in a programme or function is referred to as variable scope. A variable, for example, may be accessed only within a single function (your apartment key) or throughout the entire C programme (the shared access key).

C has four kinds of scopes: block scope. file scope. function scope.

The scope of a variable refers to the area of the programme where it can be used. A variable's or function's lifespan is the time between when memory is allocated to store it and when it is freed.

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  1. Introduction to C Programming
    24m 32s
  2. How to use LearnVern
    3m 20s
  3. Assignment : Introduction to C
    3m 17s

  1. Setting up C Environment
    17m 24s
  2. First Program in C
    25m 16s
  3. Assignment : Setting up C & First Program on C
    3m 50s

  1. Basic Syntax
    21m 44s
  2. Data Types in C Programming
    26m 19s
  3. Assignment : Structure of C
    7m 38s
  4. Variables in C Programming
    20m 35s
  5. Storage Classes in C Programming
    28m 23s
  6. printf() and scanf() Functions
    22m 56s
  7. Constants in C Programming
    18m 8s

  1. Operators in C Programming
    23m 18s
  2. Assignment : Operators in C
    3m 20s

  1. Decision Making- If Statement, If-else Statement
    19m 5s
  2. Decision Making - Nested If, Switch Statement, Nested Switch Statement
    26m 7s
  3. Entry Contolled Loops - For Loop, While Loop
    29m 25s
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    21m 9s
  5. Break, Continue and Goto Statement
    14m 54s
  6. Assignment : Decision making and Flow Control
    9m 4s

  1. Introduction to User Defined Functions
    9m 28s
  2. User Defined Functions -Function Definition, Function Declaration and Function Call
    20m 55s
  3. User Defined Functions - Functions and Parameters
    19m 39s
  4. User Defined Functions- Types of Parameters
    20m 18s
  5. Scope of a Variable
    8m 3s
  6. Assignment : Working with User Defined Functions 1
    5m 24s
  7. Assignment : Working with User Defined Functions 2
    14m 45s

  1. Declaration & Initialization of Arrays
    17m 30s
  2. Accessing Array Elements
    12m 33s
  3. Types of Arrays
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  4. 2D Arrays
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  5. Multidimensional Arrays
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  6. Introduction to Pointers
    16m 36s
  7. Pointers with Functions
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  8. Pointer Types: Null Pointer, Wide Pointer, Void Pointer
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  9. Pointer Arithmetic
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  10. Array of Pointers
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  11. Working with Strings
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  12. Introduction to Structures
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  13. Basic Structure Example
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  14. Nested Structures, Array of Structures
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  15. Union in C Programming
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  1. Typedef Function in C Programming
    10m 7s
  2. Assignment : Typedef Function
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  1. Overview of File Handling
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  2. Reading and Writing to Files
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  3. Assignment : File Handling in C
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  4. Basic File Handling
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  5. Bit Fields
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  6. File Input/Output Functions -I
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  7. File Input/Output Functions -II
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  1. Preprocessors and Header Files
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  2. Assignment : Preprocessors and Header Files
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  1. Type Casting
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  2. Assignment : Type Casting
    2m 37s

  1. Error Solving in C
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  2. Assignment : Error Solving in C
    2m 41s

  1. Recursive Functions in C
    14m 53s
  2. Assignment : Recursive Functions
    3m 5s

  1. Variable Arguments in User Defined Functioncs
    20m 2s
  2. Assignment : Variable Arguments in User Defined Functions
    3m 14s

  1. Memory Management
    11m 34s
  2. Assignment : Memory Management
    2m 58s

  1. Command Line Arguments
    9m 12s
  2. Assignment : Command Line Arguments
    2m 28s

  1. Inbuilt Library Functions- Math.h Library
    21m 39s
  2. Inbuilt Library Functions- String.h Library, Time.h Library
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  3. Assignment : C Programming Libraries
    4m 31s

  1. Running and Debugging programs in C
    19m 18s
  2. Assignment : Running and Debugging Programs
    3m 41s

  1. Compilation and Execution
    15m 53s
  2. Assignment : Compilation and Execution
    2m 59s

  1. Advanced C Features: Macros
    9m 8s
  2. Advanced C Features: Linked List
    12m 28s
  3. Assignment : Macros and Linked List
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  1. Printing a String
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  2. Swap 2 Numbers
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  3. Making a Calculator
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  4. Printing Patterns
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  5. Prime Check
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  6. Palindrome Check
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  7. Join 2 Strings
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  8. Reverse a string
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  9. Matrix Addition
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  10. Printing Array Elements and Addresses using Pointers
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  11. Structure for Student Data
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  12. Read and Write Data in a File
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  1. Course Summary
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  1. Interview Question
    30m 24s

  1. Career Guideline
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