Day2.SwitchStatements.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.

function getLetter(s) {
    let letter = s.toUpperCase().charCodeAt(s); 
    const vowels = [65, 69, 73, 79, 85];
    const bcdfg = [66, 67, 68, 70, 71];
    const hjklm = [72, 74, 75, 76, 77];
    const npqrstvwxyz = [78, 80, 81, 82, 83, 84, 86, 87, 88, 89, 90];
    let result;
    // Write your code here
    
    switch (true) {
        case (vowels.includes(letter)):
            result = "A";
            break;
        case (bcdfg.includes(letter)):            
            result = "B";
            break;
        case (hjklm.includes(letter)):
            result = "C";
            break;
        case (npqrstvwxyz.includes(letter)):
            result = "D";
            break;
    }
    
    return result;
}