A control flow graph is a graphical representation of the flow of control within a program or software application.

It is a visual depiction of how the program's instructions are executed and the paths that can be taken during its execution.

The control flow graph shows the relationships between different parts of the program, including loops, conditional statements, and function calls. In a control flow graph, each node represents a basic block of code, which is a sequence of instructions that are always executed together.

The edges between nodes represent the flow of control between different basic blocks.

By analyzing the control flow graph, developers can gain insights into the structure of the program, identify potential issues such as dead code or unreachable code, and optimize the program for better performance. Control flow graphs are commonly used in software development for program analysis, debugging, and optimization.

They provide a high-level view of the program's control flow, making it easier for developers to understand complex code and make informed decisions about how to improve its efficiency and reliability. Overall, control flow graphs are a valuable tool for software developers to visualize and analyze the flow of control within a program, helping them to write better code and create more efficient software applications.