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
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  3. Assignment : Introduction to C
    3m 17s

  1. Setting up C Environment
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  2. First Program in C
    25m 16s
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    3m 50s

  1. Basic Syntax
    21m 44s
  2. Data Types in C Programming
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  3. Assignment : Structure of C
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  4. Variables in C Programming
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  5. Storage Classes in C Programming
    28m 23s
  6. printf() and scanf() Functions
    22m 56s
  7. Constants in C Programming
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  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. Declaration & Initialization of Arrays
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  2. Accessing Array Elements
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  3. Types of Arrays
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  4. 2D Arrays
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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
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  1. Memory Management
    11m 34s
  2. Assignment : Memory Management
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  1. Command Line Arguments
    9m 12s
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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
    15m 53s
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  1. Advanced C Features: Macros
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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
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