bitburner-src/doc/source/netscript/basicfunctions/peek.rst

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peek() Netscript Function
=========================
.. js:function:: peek(port)
:param number port: Port to peek. Must be an integer between 1 and 20
:RAM cost: 1 GB
This function is used to peek at the data from a port. It returns the first element in the specified port
without removing that element. If the port is empty, the string "NULL PORT DATA" will be returned.
Read about how :ref:`netscript_ports` work here