View difference between Paste ID: mL2hy8w5 and xcBGAYFe

 function whileDemo(input) {
     let neededMoney = Number(input[0]);//2000
     let availableMoney = Number(input[1]);//1000
     let index = 2;
     let command = input[index];//2
     let totalDays = 0;
     let spendDays = 0;
 
     while (availableMoney < neededMoney) {
 
         totalDays++;
         index++;//3
 
         if (command === 'spend') {
 
             spendDays++;
 
             if (spendDays === 5) {
                 console.log("You can't save the money.");
                 console.log(totalDays);
                 break;
             }
             let moneyToSpend = Number(input[index]);//index 3
 
             availableMoney -= moneyToSpend;
             if (availableMoney < 0) {
                 availableMoney = 0;
             }
 
         } else if (command === 'save') {
             spendDays = 0;
             let moneyToSave = Number(input[index]);
             availableMoney += moneyToSave;
         }
         index++;
         command = input[index];
     }
 
     if (availableMoney >= neededMoney) {
         console.log(`You saved the money for ${totalDays} days.`);
     }
 }
 whileDemo(["2000",
     "1000",
     "spend", "1200", "save", "2000"]);