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Questions and Answers
What is an array in programming?
What is the starting index of an array?
What is the index of the last element in an array of size n?
What is the memory allocation type for an array?
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What is the purpose of the sizeof operator in the given code?
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What is the output of the given code?
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Study Notes
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 arrayaof typeintwith 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 indexiin arraya. - The
sizeofoperator can be used to get the size of an array, e.g.,sizeof(a)/sizeof(int)gives the number of elements in arraya.
Example Code
- An example code snippet demonstrates how to declare, initialize, and access array elements in C programming language.
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Description
Learn about the basics of arrays in programming, including data types, indexing, and memory allocation.
