Repetition Structures in Programming

• While loops require a condition to be met before executing an iteration, but something inside the loop must make the condition false for the loop to terminate
• Infinite loops occur when there is no way for a loop to terminate, resulting in the loop repeating indefinitely
• For loops are count-controlled loops that iterate a specific number of times
• The range function simplifies the process of writing a for loop by returning a sequence of numbers that can be iterated over
• Target variable in for loop is used to reference each item in a sequence as the loop iterates
• User can control the number of iterations in a loop by providing range inputs
• Range function can generate a sequence of numbers in descending order by using a starting number larger than the end limit and a negative step value
• Programs often calculate a running total of a series of numbers using a loop and an accumulator variable
• Augmented assignment operators are designed for performing assignments and other operations in a single statement
• Sentinels are special values used to mark the end of a sequence of items, allowing the loop to terminate when it reaches the sentinel value
• Input validation is an important part of programming to ensure that the program receives good data and does not produce bad output
• Nested loops are loops contained within other loops, with the inner loop iterating for each iteration of the outer loop. The inner loop completes its iterations faster than the outer loop, resulting in a total number of iterations equal to the number of iterations in the inner loop multiplied by the number of iterations in the outer loop.

Test your knowledge about repetition structures in programming, including the concepts of condition-controlled loops, count-controlled loops, input validation loops, and nested loops.