Problem Solving in JavaScript

Today we’ll discuss about some common problem solving in JavaScript. We’ll solve 10 problems here.

1. Find Factorial of a number using for loop
2. Find Factorial of a number using a while loop
3. Calculate Factorial in a Recursive function
4. Create a Fibonacci Series using a for loop
5. Find Fibonacci Element in a Recursive Way
6. Check whether a number is a Prime Number or not
7. Find the largest element of an array
8. Sum of all numbers in an array
9. Reverse a string
10. Remove duplicate item from an array

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1. Find Factorial of a number using for loop:

Find factorial of a number using for loop

Consider we want to find the factorial of 20 using for loop. So we have kept 20 as a number in num variable as constant. What is the definition of factorial number? In mathematics, factorial number is the multiplication of all the positive integers less than or equal to a given number. So we came to know this we need to multiply numbers in this program. so we considered variable fact equal to one. We have to use for loop here. In for loops condition we have to set i equal to one. In for loop the value of the fact variable will be multiplied with the value of i. The loop will continue with the value of num. finally the factorial value will be stored in fact variable and printer.

2. Find Factorial of a number using a while loop:

Find Factorial of a number using a while loop

From the above we already know about the definition of factorial of a number. Now we’ll discuss about the process of finding the factorial of a number using while loop . For this we’ll use while loop. Here we’ll find out the factorial of 5 and we’ll store it in variable fact . We initialized i equal to one. We have created a while loop. It check the condition is i is less than or equal to the num or not. If it is it will multiply with the fact and store it in fact then it’ll increase i by 1 till then. After fulfilling the condition the program will print the factorial of the number .

3. Calculate Factorial in a Recursive function:

Factorial in a Recursive function

Recursive function is a function that calls itself during execution. Here factorial is a function which accepts only one parameter. We want to find out the factorial of 10 so we called the factorial function with an argument. In this function it accepts parameter named n . which is checked under if…else condition. First it checked under if condition , if n is equal to 0 it returns 1. If it don’t fulfill the condition it enters into the else and return the multiplication of n and the factorial function itself . Outside of the function there in the program it prints the result.

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In this video, I will be talking about problem-solving as a developer.

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What is JavaScript - Stackfindover - Blog

Who invented JavaScript, how it works, as we have given information about Programming language in our previous article ( What is PHP ), but today we will talk about what is JavaScript, why JavaScript is used The Answers to all such questions and much other information about JavaScript, you are going to get here today. Hope this information will work for you.

Who invented JavaScript?

JavaScript language was invented by Brendan Eich in 1995. JavaScript is inspired by Java Programming Language. The first name of JavaScript was Mocha which was named by Marc Andreessen, Marc Andreessen is the founder of Netscape and in the same year Mocha was renamed LiveScript, and later in December 1995, it was renamed JavaScript which is still in trend.

What is JavaScript?

JavaScript is a client-side scripting language used with HTML (Hypertext Markup Language). JavaScript is an Interpreted / Oriented language called JS in programming language JavaScript code can be run on any normal web browser. To run the code of JavaScript, we have to enable JavaScript of Web Browser. But some web browsers already have JavaScript enabled.

Today almost all websites are using it as web technology, mind is that there is maximum scope in JavaScript in the coming time, so if you want to become a programmer, then you can be very beneficial to learn JavaScript.

JavaScript Hello World Program

In JavaScript, ‘document.write‘ is used to represent a string on a browser.

<script type="text/javascript">
	document.write("Hello World!");
</script>

How to comment JavaScript code?

• For single line comment in JavaScript we have to use // (double slashes)
• For multiple line comments we have to use / * – – * /

<script type="text/javascript">

//single line comment

/* document.write("Hello"); */

</script>

Advantages and Disadvantages of JavaScript

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The essential JavaScript concepts that you should understand

As a JavaScript developer of any level, you need to understand its foundational concepts and some of the new ideas that help us developing code. In this article, we are going to review 16 basic concepts. So without further ado, let’s get to it.

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