Hackerrank | 10 Days of Javascript | Day 2-Solution in JS | Conditional-Statements-Switch-hackerrank-Solution-in-JS

Hackerrank | 10 Days of Javascript | Day 2-Solution in JS | Conditional-Statements-Switch-hackerrank-Solution-in-JS

Objective

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

Task

Complete the getLetter(s) function in the editor. It has one parameter: a string, , consisting of lowercase English alphabetic letters (i.e., a through z). It must return A, B, C, or D depending on the following criteria:

• If the first character in string  is in the set , then return A.
• If the first character in string  is in the set , then return B.
• If the first character in string  is in the set , then return C.
• If the first character in string  is in the set , then return D.

Hint: You can get the letter at some index  in  using the syntax s[i] or s.charAt(i).

Input Format

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

Constraints

• , where  is the length of .
• String  contains lowercase English alphabetic letters (i.e., a through z) only.

Output Format

Return either A, B, C, or D according to the criteria given above.

Sample Input 0

adfgt

Sample Output 0

A

Explanation 0

The first character of string  is a. Because the given criteria stipulate that we print A any time the first character is in , we return A as our answer.

https://www.hackerrank.com/challenges/js10-switch/problem

Day 2: Conditional Statements: Switch Solution in JS

'use strict';

process.stdin.resume();
process.stdin.setEncoding('utf-8');

let inputString = '';
let currentLine = 0;

process.stdin.on('data', inputStdin => {
    inputString += inputStdin;
});

process.stdin.on('end', _ => {
    inputString = inputString.trim().split('\n').map(string => {
        return string.trim();
    });
    
    main();    
});

function readLine() {
    return inputString[currentLine++];
}

function getLetter(s) {
    let letter; 
    switch (s.charAt(0))
        {
            case ('a'||'e'||'o'||'i'||'u'):
                letter = 'A';
                break;            
            case ('b'||'c'||'d'||'f'||'g'):
                letter = 'B';
                break;
            case ('h'||'j'||'k'||'l'||'m'):
                letter = 'C';
                break;
            case ('z'||'n'||'p'||'q'||'r'||'s'||'t'||'v'||'w'||'x'||'y'):
                letter = 'D';
                break;
        }
    return letter;
}


function main() {
    const s = readLine();
    
    console.log(getLetter(s));
}