Must know in JavaScript

You need JavaScript enabled to view it to be a web developer. But when you go to work, you may not have everything. But there are some things that you may need to do once in a while. Today I will discuss some such things.

Java String : you must know about the string . you can ask me what is string? it is so easy thing . String is like a sentence or word . You sayed you name “Akash”. Also sayed that you are a good student . so “ good student ” is a string .

In JavaScript you write those code . like this

const name: “Akash”;

But one day you meet a alien . He cannot understand english .But he can understand when its red color . so now you need to write a code to color your name . in JavaScript code will be like this :

const name : “ Akash”;

name.fontcolor(red);

But Alien have one brother from another mother . He can Understand red color but it font size must be 12px . Now code will be like this :

name.fontsize(12);

Alien has two mother they are from another planet . they cannot understand your name . They can only understand if you write you name with all capital word . Now code will be like this .

name.toUpperCase();

Alien father is a intelligence alien .But he also can not understand your name he can understand your name . if you bold your name . Now code will be like this .

name.bold()

Now we talk about JavaScript Number: Ever number is a JavaScript number .ha ha ah ha . yes its too easy . you can understand easily . One day you go to market alone for buy something . you go one shop and buy a pen . the pen price are 5.30 taka . But you give 5 taka and get the pen . Now shop keeper put the taka in box and read amount with float. Code will be look like this .

const pen = 5.30;

const result =math.floor(pen);

console.log(result);

result = 5;

you go an other shop and buy a paper . now its price is 25.75 taka . but this time you must give a full amount . how much price you give the shop keeper . you cannot understand . and you write a code . this will look like this .

const paper = 25.75 ;

const result = math.ceil(paper);

console.log(result) = 26

Now we talk about javaScript Array : What is array ? cool brother it is also easy . just imagine one school . Every class has different number of student .Class one has 25 student , class two has 30 student, class three has 35 student ,class four has 25 student , class five has 20 student . you put all information in one code now the code . the code look like this .

const school = [25,30,35,25,20];

One day your head teacher come and said delete class five data , by code . now your write a code like this .

school.pop()

console.log(school) =>result will be like this [25,30,35,25]

Another day minister come to your school and said just show me the all data with out class one .By code. Now you will write a code like this

school.shift()

console.log(school) => result will be like this [30, 35, 25 ,20 ]

Every year your school commute arrange a meeting . This year commute decide a add a new class like nursari .And now you have to add nursari student to your data by code . the code will be like this .

school.unshift(15)

console.log(school) => result will be like this [15, 25, 30, 35 , 25, 20 ]

A teacher say you please show me total student data from class five to class one . this time code will be like this :

school.reverse()

console.log(school) => result will be like this [20,25,35,30,25,15]

That’s for today hope you can understand easily . Next time share another topic with easy way . take love .