String - JS

String - A string is a sequence of characters in single quotes ('), double quotes ("), or backticks (`).

javascript
const firstName = "Siyamala";
const lastName = 'Manikandan';
const message =Welcome to JavaScript`;

console.log(firstName);
console.log(lastName);
console.log(message);
`

OutPut
plaintext
Siyamala
Manikandan
Welcome to JavaScript

1.Length
returns the total number of characters in a string.
javascript
const language = "JavaScript";
console.log(language.length);


OutPut
plaintext
10

2.Uppercase
convert all characters to uppercase.
javascript
const text = "javascript";
console.log(text.toUpperCase());

Out
JAVASCRIPT
`markdown
**3.Lowercase
convert all characters to lowercase.

`
const text = "JAVASCRIPT";
console.log(text.toLowerCase());
`plaintext

OutPut
`
javascript
`markdown
4.Access Characters
Use the index position to access individual characters.
`
const word = "Coding";
console.log(word[0]);
console.log(word[3]);
`plaintext

OutPut
`
C
i
`markdown
5.indexOf()
returns the Character Position
`
const text = "JavaScript";
console.log(text.indexOf("S"));
`plaintext

OutPut
`
4
`markdown
6.includes()
used to check whether a specific value exists in an array
`
const course = "JavaScript Basics";
console.log(course.includes("Script"));
`plaintext
OutPut
`
true
`markdown
7.replace()
replaces the first matching value.
`
const sentence = "I love Java";
const result = sentence.replace("Java", "JavaScript");
console.log(result);
`plaintext

OutPut
`
I love JavaScript
`markdown

8.slice()
extracts a portion of a string.
`
const text = "JavaScript";
console.log(text.slice(0, 4));
`plaintext

OutPut
`
Java
`markdown

9.split()
Convert a string into an array.
`
const fruits = "Apple,Banana,Mango";
console.log(fruits.split(","));
`plaintext

OutPut
`
["Apple", "Banana", "Mango"]
`markdown

10.trim()
remove whitespace from both ends.
`
const username = " Sherin ";
console.log(username.trim());
`plaintext

OutPut
`
Sherin
`markdown
11.repeat()
repeats a string a specified number of times.
`
console.log("Hi ".repeat(3));
`plaintext

OutPut
`
Hi Hi Hi
`

Comments

[algorhymer]

Heyho!

I pressed a like on this article, because I hope you'll do 2 favors for me with regards to this very article:

• Please revisit the markdown. I know this sounds dumb and hoi poloi from me, but the formatting problems really turned me off.
• Please devote a section to string concatenation's performance. In most languages, pure string concatenation is really wasteful. Surprisingly in JS, this is not always the case. A lot of burned out PhDs were thrown at this problem. I think honoring their work with a small section would be a cool 'salute'.

Learning Java , Javascript , Automation Testing, SQL ,SDLC and modern QA practices every day.

Have you ever considered that dev.to has a ton of dev related articles,
but - not so surprisingly since devs have zero idea about how testing works and cannot even write good unit tests - testing related articles are scarce.
Aka you might consider gunning for the 'testing' niche with your next articles, as it is a more fertile ground than JS Beginner articles.

TL;DR I think you can provide more value with the same effort of work put in it, by chaning the subject towards testing, and automated testing.

Most important thing though:
I like the profile pic, but it'd be cooler if you could change the background into flames.
Oh... and also... years ago when I worked with QA contractors... they told me stories about the singing pillars of Hampi, James Bond Island, their culture's architectural and graphical obsession with wheels, and one of the more senior guys gave me a 1 hour laughter and joke filled presentation about how jainism might help my microfauna in my tummy so I can do the dailys in a less grumpy manner. I adhered to some advices, unfortunately I cannot go on a meat-free diet, because my ancestors developed a cuisine which is basically 99% meat. Everything in my country contains either meat or fat. I think even lollipops have traces of dried meat in them. It is like Eating Meat: The Country.
What I'm trying to say is that... I don't know your local of origin, but weaving in your culture might make the otherwise dry technical write ups more funnier and memorable on a human level.