Graph
Graph[{e1, e2, ...}] creates a graph with specified edges. Graph[{v1, v2, ...}, {e1, e2, ...}] specifies both vertices and edges.
Examples
Create graphs:
(* Simple graph from edges *)
Graph[{1 -> 2, 2 -> 3, 3 -> 1}]
(* Undirected graph *)
Graph[{1 <-> 2, 2 <-> 3, 3 <-> 4, 4 <-> 1}]
(* With vertex labels *)
Graph[{"A" -> "B", "B" -> "C", "C" -> "A"},
VertexLabels -> "Name"]Please visit the official Wolfram Language Reference for more details.