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In computer programming, loops are fundamental constructs that allow repetitive execution of code blocks. Imagine you have a task that needs to be done multiple times; instead of writing the same code again and again, you can create a loop that runs the code as many times as necessary. For example, if you want to print numbers from 1 to 10, you'd use a loop to iterate through each number and print it.

There are various types of loops including 'for' loops, which iterate a set number of times; 'while' loops, which run as long as a specified condition remains true; and 'do-while' loops, which are similar to 'while' loops but guarantee at least one execution of the loop's body. Each of these loops serves different purposes and choosing the right one can result in more efficient and readable code.

Control structures are the decision-making heart of loops. They determine the flow of program execution based on certain conditions. Within a loop, control structures can include 'break' statements, which exit the loop immediately, and 'continue' statements, which skip the current iteration and move to the next.

Using these control mechanisms, a programmer can prevent infinite loops, which occur when a loop's exit condition is never met, causing the program to run indefinitely. Proper implementation of control structures in your loops ensures that they execute as intended and prevent runtime errors or even system crashes.

Understanding loop execution is key to mastering loop behavior and creating effective programs. Loop execution entails the cycle that begins when the loop starts and ends when the loop is terminated or completed its task. When a loop starts, it first evaluates the condition. If the condition is true, the loop body (the code inside the loop) is executed. After executing the loop body, the condition is evaluated again, and this process repeats.

If the exit condition is never false, as with infinite loops, the loop will continue to run and can become problematic. This is why it is essential to ensure that the loop's logic includes a plausible exit condition or a means to update variables involved in the condition so that the loop can eventually terminate. Putting emphasis on clear and correct exit conditions can help to avoid accidental infinite loop situations and create a more robust and reliable program.