Arrays in Programming

Array Basics

• An array is a collection of similar data type, e.g., array of int type data or float.
• An array can only have data of the same type, and cannot have a combination of different data types.

Array Index

• The index of an array starts with zero (0).
• The index of the last element in an array is n-1, where n is the size of the array.

Array Memory Allocation

• An array has static memory allocation, meaning the memory size once allocated for an array cannot be changed.

Array Declaration Syntax

• The syntax for declaring an array is: datatype array_name [array_size];
• Example: int a[10]; declares an array a of type int with a size of 10.

Array Initialization

• An array can be initialized with specific values, e.g., int a = { 2,3,4,5,6,7,8,9,10,11};
• If an array is initialized with fewer values than its size, the remaining elements are automatically initialized to zero.

Accessing Array Elements

• Array elements can be accessed using their index, e.g., a[i] accesses the element at index i in array a.
• The sizeof operator can be used to get the size of an array, e.g., sizeof(a)/sizeof(int) gives the number of elements in array a.

Example Code

• An example code snippet demonstrates how to declare, initialize, and access array elements in C programming language.