C Language Basic to Advance Course > Structure of C

Storage Classes in C Programming

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In C, there are four types of storage: automatic, register, static, and external.

The extern storage class is used to provide a reference to a global variable that is shared by all application files. The variable cannot be initialised when you use 'extern,' but it does direct the variable name to a previously established storage location.

The storage class specifies the place in memory where an object's storage is allocated, as well as the duration of the storage allocation. It also determines the scope, which defines the portion of the programme where a variable name is visible, i.e. the variable is accessible by name.

A variable will only be known globally in this file if it is static. extern means that a global variable defined in another file will be known in this file, and it can also be used to call functions defined in other files.

The term "volatile" does not refer to a storage class. Type qualifiers are volatile and const.

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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
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  2. Assignment : Operators in C
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  1. Decision Making- If Statement, If-else Statement
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  1. Introduction to User Defined Functions
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  3. User Defined Functions - Functions and Parameters
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  4. User Defined Functions- Types of Parameters
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  5. Scope of a Variable
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  6. Assignment : Working with User Defined Functions 1
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    14m 45s

  1. Declaration & Initialization of Arrays
    17m 30s
  2. Accessing Array Elements
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  3. Types of Arrays
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  4. 2D Arrays
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  6. Introduction to Pointers
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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
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  1. Overview of File Handling
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  1. Error Solving in C
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  1. Recursive Functions in C
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  1. Variable Arguments in User Defined Functioncs
    20m 2s
  2. Assignment : Variable Arguments in User Defined Functions
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  1. Memory Management
    11m 34s
  2. Assignment : Memory Management
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  1. Command Line Arguments
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  1. Inbuilt Library Functions- Math.h Library
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  1. Running and Debugging programs in C
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  1. Compilation and Execution
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  1. Advanced C Features: Macros
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  1. Printing a String
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  11. Structure for Student Data
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  1. Course Summary
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  1. Interview Question
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