Day2_If-Else Statement.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 getGrade(score) {
    let grade;
    // Write your code here
    if((score > 25) && (score <= 30)){
        grade = "A";
    }
    else if((score > 20) && (score <= 25)){
        grade = "B";
    }
    else if((score > 15) && (score <= 20)){
        grade = "C";
    }
    else if((score > 10) && (score <= 15)){
        grade = "D";
    }
    else if((score > 5) && (score <= 10)){
        grade = "E";
    }
    else if((score >= 0) && (score <= 5)){
        grade = "F";
    }
    
    return grade;
}

function main() {
    const score = +(readLine());
    
    console.log(getGrade(score));
}