Arrays in Programming
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Questions and Answers

What is an array in programming?

  • A mathematical equation
  • A collection of different data types
  • A single data type
  • A collection of similar data types (correct)

    • What is the starting index of an array?

  • 1
  • 0 (correct)
  • -1
  • None of the above

    • What is the index of the last element in an array of size n?

  • n
  • n-1 (correct)
  • n+1
  • n/2

    • What is the memory allocation type for an array?

    <p>Static</p> Signup and view all the answers

    What is the purpose of the sizeof operator in the given code?

    <p>To find the length of the array</p> Signup and view all the answers

    What is the output of the given code?

    <p>Length of array is 10</p> Signup and view all the answers

    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 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.

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    Quiz Team

    Description

    Learn about the basics of arrays in programming, including data types, indexing, and memory allocation.

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