JavaScript Chapter 3 - Practice Set on Loops and Functions | JavaScript Tutorial in Hindi #12

This video is about some practice questions on loops and functions in JavaScript

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[hokorashi_]

I am a bit late here, just wanted to say ur tutorials are awesome thanks for helping me follow my passion. Also wanted to add a bit that in the problem no.3 u can see that everytime u execute it says try again first than asks user for a number. U can over come that by nesting an if else statement in while loop. i tried it and works like a charm. Here is the code :
let n = 4
let a
while(a != n)
{
a = prompt("Enter a number")
if(a == n)
{
console.log("You wrote correct number")
}
else {
console.log("Try again")
}
}

[manvanthmn]

The video's intro and outro was very good . the video quality is also good, the concepts are best . in all round case . I will rate this course a console.log( '5/5' )

[masaudhusnainathar]

This Code can also be run by this :
Let obj = {
Harry:90,
Shubam:95,
Anika:96
}
for (let a in obj){
console.log(a);
console.log(obj[a]);
console.log("Marks of " +a+ " are " + obj[a]);
}

[Yenoke]

9:16 you can do it like this =>

let cn = 4
let i;
while(i!=cn){
i = prompt("Enter a number")
if(i==cn) {
console.log("You have entered the correct number")
}
else {
console.log("Try again")
}
}

[learner]

Very amazing tutorials!
I'm enjoying learning with you as always!
We're lucky to have Harry in the world of programming who provides top notch quality content for free
❤

[MSajjad]

Harry Bhai the best teaching.. learning Javascript with is really amazing... Enjoying this series

[Hafijur]

🎯 Key Takeaways for quick navigation:

00:00 🔄 *In today's video, the instructor introduces practice questions on loops and functions in JavaScript, covering various loop types like while, do-while, for, for-in, and for-of loops.*
- Introduction to practice questions on loops and functions in JavaScript,
- Explanation of different loop types including while, do-while, for, for-in, and for-of loops.
01:03 💻 *The instructor demonstrates writing a program to print the marks of students stored in an object using a for loop, emphasizing meaningful variable naming and understanding object keys.*
- Writing a program to print student marks stored in an object using a for loop,
- Emphasizing meaningful variable naming and understanding object keys.
04:52 🔄 *Explaining the use of for-in loop as an alternative to for loop for iterating over object keys and values, highlighting the simplification of code compared to traditional for loops.*
- Introducing the for-in loop as an alternative for iterating over object keys and values,
- Highlighting the simplification of code compared to traditional for loops.
06:50 🔁 *Demonstrating a program using a while loop to continuously prompt the user to enter a number until the correct number is provided, showcasing the concept of looping until a condition is met.*
- Illustrating a program using a while loop to continuously prompt user input until a condition is met,
- Demonstrating the concept of looping until a condition is fulfilled.
09:54 📝 *Solving a problem to find the mean of five numbers using an arrow function, emphasizing the preference for arrow functions and demonstrating concise code for calculation.*
- Solving a problem to find the mean of numbers using an arrow function,
- Demonstrating the preference for arrow functions and concise code for calculation.- 00:00 🔄 Overview of Practice Questions
- Solving practice questions on loops and functions.
- Exploring various loop types: while loop, do-while loop, for loop, for in loop, for of loop.
- Demonstrating how to solve questions to solidify concepts from chapter 3.
01:03 🔄 *Printing Student Marks Using a For Loop*
- Using a for loop to print the marks of students stored in an object.
- Demonstrating how to iterate over object keys to access and print values.
05:25 🔄 *Using For-In Loop to Print Student Marks*
- Utilizing the for-in loop to simplify printing object key-value pairs.
- Demonstrating how for-in loop can simplify iterating over object properties.
06:50 🔄 *Creating a Loop to Prompt User Until Correct Input*
- Implementing a loop to continuously prompt the user until the correct number is entered.
- Using a while loop to keep asking for input until the correct value is provided.
09:54 🔄 *Calculating Mean of Numbers Using an Arrow Function*
- Defining an arrow function to calculate the mean of five numbers.
- Using a concise arrow function syntax for mean calculation.

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Maza aagya harry bhai bas aise hi knowledge baante rho.

[findsyed]

Hi Harry,
Syed here from Indonesia
it's amazing
Thanks for sharing javascript course.

let cn = 4
let i
while(i !=cn){i=prompt("kindly enter the correct number")

if (i !=cn ){alert(" you entered wrong number")}
}
console.log("You enter the correct number")

[taniyaverma]

1:22 Very amazing tutorials!
I'm enjoying learning with you as always!

[MuhammadUsamaQamar]

The first question was actually very difficult to understand for a beginner

[motivational]

Thank you, Harry, you have helped me a lot with these courses. May God bless you with success....😘

[purnimavats]

In problem 3, we have to convert our input data type into int bcoz it takes input as a string, which maybe results in an error(in VS code). It happened to me 😅. I used the following code to resolve it. Hope it will help someone else too


let cn = 4;
let i;
while (i != n){
i = parseInt(prompt("Enter a number:")
}
console.log("You have entered the correct number")



Thank you so much bro for these tutorials ❤❤

[abdulquadir]

Excellent questions, Harry bhai. Level badha diya aapne...

I solved #3 like this:

const cn = 4;

while (parseInt(prompt("Input the correct number: ")) != cn) {
console.log("Try again!");
}

console.log("You entered the correct number.");

[wonderfullife]

To remove the try again during the start in problem 3, it's better to use if else. Like this

let cn ="Harry Bhai";
let i
while(cn != i){
i =prompt("Who is the Best Youtuber")
if(i !=cn){
console.log("Galat Zabab, Try again")
}
else{
console.log("Correct Answer")
}
}

[vaibhavtripathi]

Foe question 3 this code can also be used...
let cn = 43
let i
while (i != cn) {
i = prompt("Enter a number")
if(i != cn){
console.log("Try again")
}
}
console.log("You have entered the correct number")

[vickys]

All Programs, Thank You Harry Bhai ❤❤❤
// Practice Question 1 & 2- write a program to print the marks of a student in an object using for loop
// Using for..in loop
let marks_1 = {
Harry:98,
Rohan:70,
Aakash: 7

}

for (const x in marks_1) {
console.log(`The Marks scored by the student ${x} is : ${marks_1[x]}` );

}

// Using for loop - CWH Lec
let marks_2 = {
Harry:98,
Rohan:70,
Aakash: 7

}

for (let i = 0; i < Object.keys(marks_2).length; i++) {
console.log(`The Marks of ${Object.keys(marks_2)[i]} is

// Object.keys(marks_2)
// Returns an Array with the keys as value

// Object.keys(marks_2).length
// Returns the length of the Array (4)

// Object.values(marks_2)
// Returns an Array with the values as value

//
// Returns the corresponding value of the key in the object (Alternate method to print values)

}

// Practice Question 3 - write a program that prints "Try again" until user enters the correct number
const prompt = true});
let CorrectNumber = 5;
let i;
while(i != CorrectNumber){
i = prompt("Enter a Number ");
console.log("Try Again"); // flaw - Prints "Try again" even when entered the CorrectNumber
}
console.log("You have entered the correct number");

// Practice Question 4 - write a function to find the mean of 5 numbers

let a = prompt("Enter any Number ");
a = Number.parseInt(a);

let b = prompt("Enter any Number ");
b = Number.parseInt(b);

let c = prompt("Enter any Number ");
c = Number.parseInt(c);

let d = prompt("Enter any Number ");
d = Number.parseInt(d);

let e = prompt("Enter any Number ");
e = Number.parseInt(e);

function MeanNumberFinder(a, b, c, d, e){
return (a + b + c + d + e) / 5;

}

console.log(MeanNumberFinder(a, b, c, d, e));

[Abhilash_Nanda]

A different approach to get average for any number of arguments:
function multiple(...arguments){
let a=arguments;
let b=a.length;
let sum=0;
for(let i=0;i<b;i++){
sum=sum+a[i];}
return sum/b}
multiple(5, 6, 7, 8, 9, 10);