[Home](./index.md) > [bitburner](./bitburner.md) > [Hacknet](./bitburner.hacknet.md) > [getCoreUpgradeCost](./bitburner.hacknet.getcoreupgradecost.md) ## Hacknet.getCoreUpgradeCost() method Calculate the cost of upgrading hacknet node cores. Signature: ```typescript getCoreUpgradeCost(index: number, n: number): number; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | index | number | Index/Identifier of Hacknet Node. | | n | number | Number of times to upgrade cores. Must be positive. Rounded to nearest integer. | Returns: number Cost of upgrading the specified Hacknet Node's number of cores. ## Remarks RAM cost: 0 GB Returns the cost of upgrading the number of cores of the specified Hacknet Node by n. 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.