# What Is One Dimensional Array in Data Structure?

//

Heather Bennett

A one-dimensional array is a data structure that stores a fixed-size sequence of elements of the same type. It is also known as a linear array or a vector. In simple terms, a one-dimensional array can be thought of as a list of items, where each item has a unique index or position.

## Declaring and Accessing Elements in a One-Dimensional Array

To declare an array in HTML, you can use the <script> tag with the var keyword followed by the name of the array and square brackets to define its size. For example:

```  ```
<script>
var myArray = new Array(5);
</script>
```
```

In this example, we have declared an array called myArray with a size of 5 elements. Note that arrays are zero-indexed, which means the first element is accessed using the index 0.

You can access and modify elements in an array using their index. For example:

```  ```
<script>
var myArray = new Array(5);

myArray[0] = "Hello";
myArray[1] = "World";

document.write(myArray[0] + " " + myArray[1]);
</script>
```
```

This code will output “Hello World” because we assigned values to the first two elements (index 0 and index 1) of the array and then printed them using the document.write() method.

## Operations on One-Dimensional Arrays

Traversal: Traversing an array means accessing each element of the array exactly once. This can be done using a loop, such as a for loop or a while loop. For example:

```  ```
<script>
var myArray = [1, 2, 3, 4, 5];

for (var i = 0; i < myArray.length; i++) {
document.write(myArray[i] + " ");
}
</script>
```
```

This code will output "1 2 3 4 5" by traversing the array and printing each element.

Insertion: Inserting an element into an array means adding a new element at a specific position within the array. This can be accomplished by shifting the existing elements to make room for the new element and then assigning its value to the desired index. For example:

```  ```
<script>
var myArray = [1, 2, 4, 5];

// Inserting element at index 2
for (var i = myArray.length -1; i >=2 ; i--) {
myArray[i+1] = myArray[i];
}

myArray[2] = 3;

// Printing the updated array
for (var j =0 ; j
``````
``` This code will output "1 2 3 4 5" by inserting the value "3" at index position "2" and shifting the subsequent elements to the right. Deletion: Deleting an element from an array means removing an element from a specific position within the array. This can be done by shifting the elements after the deleted element to fill the empty space. For example: <script> var myArray = [1, 2, 3, 4, 5]; // Deleting element at index 2 for (var i =2 ; i < myArray.length -1; i++) { myArray[i] = myArray[i+1]; } myArray.length--; // Printing the updated array for (var j =0 ; j This code will output "1 2 4 5" by deleting the element at index position "2" and shifting the subsequent elements to the left. Advantages of One-Dimensional Arrays One-dimensional arrays provide a simple and efficient way to store and access a sequence of values. They allow random access to elements using their index. Operations such as traversal, insertion, and deletion can be easily performed on one-dimensional arrays. Conclusion A one-dimensional array is a fundamental data structure that allows you to store and manipulate a fixed-size sequence of elements. By understanding how to declare, access, and perform common operations on one-dimensional arrays, you can effectively manage collections of data in your programs. Remember to use appropriate loops and indexing techniques for efficient traversal and manipulation of array elements. 10 Related Question Answers Found What Is 1D Array in Data Structure? In data structure, an array is a collection of elements that are stored in contiguous memory locations. It provides a way to store multiple values of the same data type under a single variable name. Arrays can be one-dimensional (1D) or multi-dimensional. What Is One Dimensional Range Searching in Data Structure? One Dimensional Range Searching in Data Structure Range searching is a common problem in data structures that involves finding all the elements within a certain range of values. In this article, we will explore the concept of one-dimensional range searching and how it can be implemented using various data structures. What is One-Dimensional Range Searching? What Is Dimensional Array in Data Structure? In data structures, a dimensional array is a type of data structure that stores elements in a multi-dimensional grid-like format. It is also known as a multi-dimensional array or simply an array of arrays. A dimensional array provides a way to organize and access data in multiple dimensions, such as rows and columns. How Multi Dimensional Array Represent in Data Structure? How Multi Dimensional Array Represents in Data Structure In the field of computer science, data structures are essential for storing and organizing data efficiently. One such data structure is a multi-dimensional array. A multi-dimensional array is an array that has more than one dimension. What Is Multi-Dimensional Array in Data Structure? Multi-dimensional arrays are a fundamental concept in data structures. They allow us to store data in a structured and organized manner. A multi-dimensional array is an array with multiple dimensions or levels. What Is Multilevel Data Structure? A multilevel data structure is a type of data structure that organizes data in a hierarchical manner, with multiple levels of organization. Each level contains sub-levels, creating a tree-like structure where each level represents a different category or classification. Understanding Multilevel Data Structure In a multilevel data structure, the top-level is known as the root level, and it is followed by various levels below it. What Is Single and Multidimensional Array in Data Structure? In data structure, an array is a collection of elements that are stored in a contiguous memory location. It is one of the fundamental data structures used in programming. Arrays can be classified into two types: single-dimensional arrays and multidimensional arrays. What Is Immutable Data Structure? What Is Immutable Data Structure? An immutable data structure is a data structure that cannot be modified after it is created. In other words, once the data is assigned to the structure, it cannot be changed. What Is a Fixed Data Structure? What Is a Fixed Data Structure? A fixed data structure is a type of data structure that has a predefined size and cannot be changed once it is created. In other words, the number of elements or the amount of memory allocated for the data structure remains constant throughout its lifetime. What Is Contiguous Data Structure? A contiguous data structure is a type of data structure where the elements are stored in adjacent memory locations. This means that the elements are stored one after another in a continuous block of memory. Contiguous data structures are commonly used in programming and can be found in various applications, such as arrays and linked lists. ```
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