# isForest -- determines whether a graph is a forest

## Synopsis

• Usage:
f = isForest G
• Inputs:
• G, an instance of the type Graph,
• Outputs:
• f, , whether a graph is a forest

## Description

A graph is a forest if it is a disjoint collection of trees.

 i1 : G = graph({{1,2},{1,3},{6,4},{4,5}},EntryMode=>"edges"); i2 : isForest G o2 = true