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javascript practice coding questions

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Suyog Kulkarni answered on May 1, 2021 Popularity 10/10 Helpfulness 2/10

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javascript practice coding questions

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Try W3resource. Best!!

https://www.w3resource.com/javascript-exercises/

Popularity 10/10 Helpfulness 2/10 Language javascript

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Tags: javascript

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Contributed on Mar 23 2023

Suyog Kulkarni

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JavaScript coding questions for practice

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// Question 1: Reverse a string
function reverseString(str) {
  return str.split('').reverse().join('');
}

console.log(reverseString("hello")); // Output: olleh


// Question 2: Find the largest element in an array
function findLargestElement(arr) {
  let largest = arr[0];
  
  for (let i = 1; i < arr.length; i++) {
    if (arr[i] > largest) {
      largest = arr[i];
    }
  }
  
  return largest;
}

console.log(findLargestElement([1, 5, 3, 9, 2])); // Output: 9


// Question 3: Check if a number is prime
function isPrime(number) {
  if (number <= 1) {
    return false;
  }
  
  for (let i = 2; i <= Math.sqrt(number); i++) {
    if (number % i === 0) {
      return false;
    }
  }
  
  return true;
}

console.log(isPrime(11)); // Output: true

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Contributed on Sep 11 2023

YOU.com

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javascript programming questions

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// Common JavaScript programming questions

// 1. How to check if a variable is an array?
let myArray = [1, 2, 3];
if (Array.isArray(myArray)) {
  console.log('The variable is an array.');
} else {
  console.log('The variable is not an array.');
}

// 2. How to loop through an array in JavaScript?
let myArray = [1, 2, 3];
for (let i = 0; i < myArray.length; i++) {
  console.log(myArray[i]);
}

// 3. How to sort an array in JavaScript?
let myArray = [3, 2, 1];
myArray.sort();
console.log(myArray);

// 4. How to find the length of an object in JavaScript?
let myObject = { a: 1, b: 2, c: 3 };
let objectLength = Object.keys(myObject).length;
console.log(objectLength);

// 5. How to generate a random number in a specific range in JavaScript?
let randomNumber = Math.floor(Math.random() * (max - min + 1)) + min;
console.log(randomNumber);

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Contributed on Sep 12 2023

YOU.com

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javascript practice questions

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Personnally https://www.w3schools.com/js/js_exercises.asp

Popularity 10/10 Helpfulness 2/10 Language javascript

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Contributed on May 01 2021

Undefined

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javascript coding practice

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// Example of a JavaScript coding practice exercise - Finding the maximum number in an array

const numbers = [5, 2, 9, 1, 7];

function findMaximumNumber(numbers) {
  let maximum = numbers[0];
  
  for (let i = 1; i < numbers.length; i++) {
    if (numbers[i] > maximum) {
      maximum = numbers[i];
    }
  }
  
  return maximum;
}

console.log(findMaximumNumber(numbers)); // Output: 9

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Contributed on Sep 12 2023

YOU.com

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javascript practice coding questions

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