Arrays in C

Arrays in C is one of the most used data structures in C programming , It is a collection of elements, all of the same data type, arranged sequentially in memory. Each element in an array can be accessed using an index, which represents the position of the element within the array. The index starts at 0 for the first element and increments by 1 for each subsequent element. This zero-based indexing is a distinctive feature of C arrays.

An array in C is a fixed-size collection of similar data items stored in contiguous memory locations. It can be used to store the collection of primitive data types such as int, char, float, etc., and also derived and user-defined data types such as pointers, structures, etc.

In the below PDF we discuss about Arrays in detail in simple language, Hope this will help in better understanding.

C Tutorial

Declaring and Initializing Arrays :

Arrays are declared in C using the following syntax:

data_type array_name[array_size];

Here, data_type specifies the type of elements the array will hold, array_name is the chosen name for the array, and array_size indicates the number of elements the array can accommodate

Initializing an array involves assigning values to its elements. This can be done during declaration or afterward using a loop. For example:

int numbers[5] = {1, 2, 3, 4, 5}; // Initializing during declaration

double temperatures[7]; // Declaration without initialization

for (int i = 0; i < 7; i++) {
    temperatures[i] = 98.6 + i;

Related Question

 An array in C is a collection of elements of the same data type, stored in contiguous memory locations. Each element in the array is accessed using an index.

To declare an array in C, you specify the data type of the elements and the array’s name, followed by the size of the array in square brackets. For example: int numbers[5];

Array indexing in C is zero-based, which means the first element of the array is accessed using index 0, the second with index 1, and so on.

 C does not have a built-in mechanism to find the length of an array. You need to keep track of the array’s length manually or use sentinel values (e.g., null-terminated strings).

No, arrays in C can only store elements of the same data type.


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