I am working on a 'skill calculator' however i have ran into this problem. when putting 3 into the input field it displays the experience from 2... when putting 2 into the input field it's a null which is level 1... it's the same with all numbers up to 100 it displays the lower numbers experience 56 will display 55 experience.

```
function levelToExperience(goalLevel) {
var experience = 0;
for(var curLevel = 1 ; curLevel < goalLevel; curLevel += 1) {
experience = Math.floor(10 * Math.pow(curLevel, 3) - 10);
}
return Math.floor(experience);
}
// Convert experience to level
function experienceToLevel(goalExperience) {
var curExperience = 0;
for(var level = 1; level < 100; level += 1) {
curExperience += Math.floor(Math.floor(10 * Math.pow(level, 3)) - 10);
if(curExperience > goalExperience) {
break;
}
}
return level;
}
```

This calculation i am using 10L3 − 10 (L = level) level 2 = 70 exp so i can't understand why 2 is showing 0 and 3 is showing 2's experience.

The problem is this loop. When you pass 2 into it, you continue

if curLevel is less than goalLevel, which is 2.So you do

`Math.floor(10 * Math.pow(1, 3) - 10)`

which is 0. Then curLevel is incremented, however, curlevel isn't less than 2, so you exit returning 0.You don't have to loop, I think you just want to know how much experience to level to the goal.

Likewise, your experienceToLevel, can be greatly reduced if you take the Cube Root of the value: