Array declaration with initialization | Part - 29 | C language tutorial for beginners

Welcome to Tech Talk Tricks and in this video, we will learn how to initialize array while declaration time.So stay tuned and watch Array declaration with initialization with example in c language.

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Array variables are declared identically to variables of their data type, except that the variable name is followed by one pair of square [ ] brackets for each dimension of the array.
Uninitialized arrays must have the dimensions of their rows, columns, etc. listed within the square brackets.
Dimensions used when declaring arrays in C must be positive integral constants or constant expressions.
In C99, dimensions must still be positive integers, but variables can be used, so long as the variable has a positive value at the time the array is declared. ( Space is allocated only once, at the time the array is declared. The array does NOT change sizes later if the variable used to declare it changes. )

Initializing Arrays
Arrays may be initialized when they are declared, just as any other variables.
Place the initialization data in curly {} braces following the equals sign. Note the use of commas in the examples below.
An array may be partially initialized, by providing fewer data items than the size of the array. The remaining array elements will be automatically initialized to zero.
If an array is to be completely initialized, the dimension of the array is not required. The compiler will automatically size the array to fit the initialized data. ( Variation: Multidimensional arrays - see below. )
Examples:
int i = 5, intArray[ 6 ] = { 1, 2, 3, 4, 5, 6 }, k;
float sum = 0.0f, floatArray[ 100 ] = { 1.0f, 5.0f, 20.0f };
double piFractions[ ] = { 3.141592654, 1.570796327, 0.785398163 };
Designated Initializers:
In C99 there is an alternate mechanism, that allows you to initialize specific elements, not necessarily at the beginning.
This method can be mixed in with traditional iniitalization
For example:
int numbers[ 100 ] = { 1, 2, 3, [10] = 10, 11, 12, [60] = 50, [42] = 420 };
In this example,the first three elements are initialized to 1, 2, and 3 respectively.
Then element 10 ( the 11th element ) is initialized to 10
The next two elements ( 12th and 13th ) are initialized to 11 and 12 respectively.
Element number 60 ( the 61st ) is initialized to 50, and number 42 ( the 43rd ) to 420.
( Note that the designated initializers do not need to appear in order. )
As with traditional methods, all uninitialized values are set to zero.
If the size of the array is not given, then the largest initialized position determines the size of the array.

How to initialize array to 0 in C,
Array initialization C,
Declaring and initializing arrays in C,
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