Day 2: Conditional Statements: Switch in Javascript | 10 Days Of JavaScript Solutions | HackerRank Programming Solutions [💯Correct]

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Introduction To JavaScript

JavaScript is a lightweight, cross-platform, and interpreted scripting language. It is well-known for the development of web pages, many non-browser environments also use it. JavaScript can be used for Client-side developments as well as Server-side developments. JavaScript contains a standard library of objects, like Array, Date, and Math, and a core set of language elements like operators, control structures, and statements.

Advantages of JavaScript

The merits of using JavaScript are −

  • Less server interaction − You can validate user input before sending the page off to the server. This saves server traffic, which means less load on your server.
  • Immediate feedback to the visitors − They don’t have to wait for a page reload to see if they have forgotten to enter something.
  • Increased interactivity − You can create interfaces that react when the user hovers over them with a mouse or activates them via the keyboard.
  • Richer interfaces − You can use JavaScript to include such items as drag-and-drop components and sliders to give a Rich Interface to your site visitors.

Link for the ProblemDay 2: Conditional Statements: Switch – Hacker Rank Solution

Day 2: Conditional Statements: Switch– Hacker Rank Solution

Problem:

Objective

In this challenge, we learn about switch statements. Check out the attached tutorial for more details.

Task

image 17

Function Description

Complete the getLetter function in the editor below.

getLetter has the following parameters:

  • string s: a string

Returns

  • string: a single letter determined as described above

Input Format

Stub code in the editor reads a single string denoting  from stdin.

Constraints

image 16

Sample Input 0

adfgt

Sample Output 0

A

Explanation 0

image 15
Day 2: Conditional Statements: Switch – Hacker Rank Solution
function getLetter(s) {
  let letter;
  // Write your code here
  switch (true) {
    case "aeiou".includes(s[0]):
      letter = "A";
      break;
    case "bcdefg".includes(s[0]):
      letter = "B";
      break;
    case "hijklm".includes(s[0]):
      letter = "C";
      break;
    case "nopqrstuvwxyz".includes(s[0]):
      letter = "D";
      break;
  }
  return letter;
}

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