Which programming concept allows you to evaluate conditions and execute code accordingly?

Flow control is a programming concept that is essential for managing the execution of code based on certain conditions. It allows developers to direct the flow of a program's execution by evaluating conditions, using structures such as if statements, switch cases, loops (like for and while), and more. When a condition evaluates to true or false, flow control statements determine which block of code should be executed.

For instance, in an if statement, the code within the block will only run if the specific condition is met, allowing for tailored responses based on the state of the program or input provided. This capability is fundamental in programming as it enables the creation of dynamic, responsive applications that can adapt to different scenarios and user inputs.

In contrast, variables are used to store data, functions are used to encapsulate reusable code, and classes represent blueprints for objects in object-oriented programming. While all these concepts are crucial to programming, they do not inherently evaluate conditions and dictate the execution path of code in the manner that flow control does.