What Is Strings in Data Structure?


Larry Thompson

What Is Strings in Data Structure?

In data structure, a string is a sequence of characters. It is one of the most commonly used data types in programming and is essential for storing and manipulating textual data. In this article, we will explore the concept of strings in data structure and learn how to work with them.

Defining Strings

A string can be represented as an array or sequence of characters. Each character within the string has its own index or position.

The first character is at index 0, the second character at index 1, and so on. Strings are typically enclosed within quotation marks (”) or double quotation marks (“”).


        String name = "John Doe";

In the above example, the variable ‘name’ holds a string value “John Doe”.

Operations on Strings

Strings support various operations that allow us to manipulate, concatenate, compare, and extract information from them.


The concatenation operation allows us to combine two or more strings into a single string. In most programming languages, concatenation is performed using the ‘+’ operator.


        String firstName = "John";
        String lastName = "Doe";
        String fullName = firstName + " " + lastName;

The variable ‘fullName’ will hold the concatenated value “John Doe”.


The length operation allows us to determine the number of characters in a string. It is often used to check if a string meets certain length requirements.


        String message = "Hello, world!";
        int length = message.length();

The variable ‘length’ will hold the value 13, which is the number of characters in the string.


The substring operation allows us to extract a portion of a string. It takes two parameters: the starting index and the ending index (exclusive) of the desired substring.


        String word = "programming";
        String subString = word.substring(3, 7);

The variable ‘subString’ will hold the value “gram”, which is extracted from the original string.


Strings are an integral part of data structures and programming languages. They provide a way to store and manipulate textual data efficiently.

Understanding how to work with strings is crucial for any programmer or developer. By utilizing operations like concatenation, length, and substring, you can effectively handle and process strings in your programs.

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