Update 1603-design-parking-system.js

Updating if conditions.

Author: aadil42

javascript/1603-design-parking-system.js

@@ -18,23 +18,26 @@ class ParkingSystem {
    * @return {boolean}
    */
   addCar(carType) {
-      if(carType === 1 && this.isBigRemaining > 0) {
+    const isBigCarAvailable = (carType === 1 && this.isBigRemaining > 0); 
+    if(isBigCarAvailable) {
         this.isBigRemaining -= 1;
         return true;
     }
-    if(carType === 2 && this.isMediumRemaining > 0) {
+    const isMediumCarAvailable = (carType === 2 && this.isMediumRemaining > 0);
+    if(isMediumCarAvailable) {
         this.isMediumRemaining -= 1;
         return true;
     }
-    if(carType === 3 && this.isSmallRemaining > 0) {
+    const isSmallCarAvailable = (carType === 3 && this.isSmallRemaining > 0);
+    if(isSmallCarAvailable) {
         this.isSmallRemaining -= 1;
         return true;
     }
     return false;
   }
-  }
 }
 
+
 /** 
  * Your ParkingSystem object will be instantiated and called as such:
  * var obj = new ParkingSystem(big, medium, small)