jssubstring

Substring is a commonly used function in programming that is used to extract a portion of a string. It is available in many programming languages and is used to manipulate strings efficiently. In this article

we will explore the substring function and how it can be used in various programming languages.

The substring function is used to extract a portion of a string starting at a specified position and ending at a specified position. It takes two arguments - the starting position and the length of the substring. The starting position is the index of the character where the substring should begin

and the length is the number of characters to extract.

Let's take a look at how the substring function works in some popular programming languages.

1. JavaScript:

In JavaScript

the substring function is used to extract a portion of a string. Here is an example of how it can be used:

```javascript

let str = "Hello

World!";

let substr = str.substring(7

5);

console.log(substr); // Output: World

```

In this example

the substring function is used to extract the word "World" from the string "Hello

World!" starting at index 7 and ending after 5 characters.

2. Python:

In Python

the substring function is not directly available like in JavaScript. Instead

string slicing is used to extract a portion of a string. Here is an example of how it can be done:

```python

str = "Hello

World!"

substr = str[7:12]

print(substr) # Output: World

```

In this example

string slicing is used to extract the word "World" from the string "Hello

World!" starting at index 7 and ending at index 12.

3. Java:

In Java

the substring function is available as a method of the String class. Here is an example of how it can be used:

```java

String str = "Hello

World!";

String substr = str.substring(7

12);

System.out.println(substr); // Output: World

```

In this example

the substring method is used to extract the word "World" from the string "Hello

World!" starting at index 7 and ending at index 12.

Overall

the substring function is a useful tool for manipulating strings in programming. It allows for the extraction of specific portions of a string

which can be useful in many different scenarios. Whether you are working in JavaScript

Python

Java

or any other programming language

the substring function can help you work with strings efficiently.