Given the who numbers of the endpoints, reports the link connecting the turtles. If there is no such link reports nobody. To refer to breeded links you must use the singular breed form with the endpoints.
ask link 0 1 [ set color green ] ;; unbreeded link connecting turtle 0 and turtle 1 will turn green ask directed-link 0 1 [ set color red ] ;; directed link connecting turtle 0 and turtle 1 will turn red
See also patch-at.
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