Conditional Statement (if-else) || JS hackerrank Solution

 Task

Complete the getGrade(score) function in the editor. It has one parameter. Make a grade system by using if else statement.

use strict';   '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';     }else{              }     return grade;   }     function main() {     const score = +(readLine());          console.log(getGrade(score));   }