getLevelUpgradeCost() Netscript Function
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.. js:function:: getLevelUpgradeCost(i, n)

    :param number i: Index/Identifier of Hacknet Node. :ref:`See here for details <netscript_hacknetnodeapi_referencingahacknetnode>`
    :param number n: Number of levels to upgrade. Must be positive. Rounded to nearest integer

    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.

    :RAM cost: 0 GB