C Language Basic to Advance Course > Derived Datatypes

Declaration & Initialization of Arrays

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The array's size must be provided at declaration. The array's size during declaration instructs the compiler to allocate and reserve the memory regions provided. Data items of type int, char, and so on can be used to initialise array elements.

Initializing Elements and Declaring an Array At the moment of declaration, an array can be initialised. The compiler will allocate an array of size equal to the number of array elements in this method of array declaration. To declare and initialise an array at the same time, use the following syntax.

An array index is the name given to the number. In Java, we can also use the index number to initialise arrays. / declare an array int[] age = new int[5]; / initialise array age[0] = 12; age[1] = 4; age[2] = 5; and so on.

Initialization of a single-dimensional array. Array initialization is the process of assigning values to array elements. Before an array can be utilised in a programme, its elements must be initialised once it has been specified. The programme provides unexpected results if they are not correctly initialised.

There are two ways to provide array initializers:

  • Array elements must be initialised in subscript order when using C89-style initializers.
    Array elements can be initialised in any order using defined initializers, which allow you to specify the values of the subscript components to be initialised.

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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
    17m 24s
  2. First Program in C
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    3m 50s

  1. Basic Syntax
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  6. printf() and scanf() Functions
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  2. Assignment : Operators in C
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  1. Introduction to User Defined Functions
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  5. Scope of a Variable
    8m 3s
  6. Assignment : Working with User Defined Functions 1
    5m 24s
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    14m 45s

  1. Declaration & Initialization of Arrays
    17m 30s
  2. Accessing Array Elements
    12m 33s
  3. Types of Arrays
    7m 27s
  4. 2D Arrays
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  5. Multidimensional Arrays
    25m 9s
  6. Introduction to Pointers
    16m 36s
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    34m 18s
  8. Pointer Types: Null Pointer, Wide Pointer, Void Pointer
    24m 3s
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  10. Array of Pointers
    9m 58s
  11. Working with Strings
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  12. Introduction to Structures
    9m 47s
  13. Basic Structure Example
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  14. Nested Structures, Array of Structures
    27m 24s
  15. Union in C Programming
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  1. Typedef Function in C Programming
    10m 7s
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    2m 57s

  1. Overview of File Handling
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    2m 37s

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    3m 5s

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

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

  1. Command Line Arguments
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  1. Inbuilt Library Functions- Math.h Library
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    4m 31s

  1. Running and Debugging programs in C
    19m 18s
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    3m 41s

  1. Compilation and Execution
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  1. Advanced C Features: Macros
    9m 8s
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    12m 28s
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    3m 19s

  1. Printing a String
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  1. Course Summary
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