Characteristics of Control Flow Graph

1. The control flow graph is process-oriented.
2. The control flow graph shows all the paths that can be traversed during a program execution.
3. A control flow graph is a directed graph.
4. Edges in CFG portray control flow paths and the nodes in CFG portray basic blocks.

There exist 2 designated blocks in the Control Flow Graph:

1. Entry Block: The entry block allows the control to enter into the control flow graph.
2. Exit Block: Control flow leaves through the exit block.

Hence, the control flow graph comprises all the building blocks involved in a flow diagram such as the start node, end node and flows between the nodes.

A Control Flow Graph (CFG) is the graphical representation of control flow or computation during the execution of programs or applications. Control flow graphs are mostly used in static analysis as well as compiler applications, as they can accurately represent the flow inside a program unit. The control flow graph was originally developed by Frances E. Allen..