[Home](./index.md) > [bitburner](./bitburner.md) > [HackNet](./bitburner.hacknet.md) > [getLevelUpgradeCost](./bitburner.hacknet.getlevelupgradecost.md)
## HackNet.getLevelUpgradeCost() method
Returns the cost of upgrading the specified Hacknet Node by n levels.
If an invalid value for n is provided, then this function returns 0. If the specified Hacknet Node is already at max level, then Infinity is returned.
Signature:
```typescript
getLevelUpgradeCost(index: number, n: number): number;
```
## Parameters
| Parameter | Type | Description |
| --- | --- | --- |
| index | number | Index/Identifier of Hacknet Node. |
| n | number | Number of levels to upgrade. Must be positive. Rounded to nearest integer. |
Returns:
number
Cost of upgrading the specified Hacknet Node.
## Remarks
0 GB