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Authors:
Tony Gaddis
Chapter:
Repetition Structures
Exercise:
Short Answer
Question:1 | ISBN:9780132576376 | Edition: 2

Question

What is a condition-controlled loop?

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Answer

  • A condition-controlled loop, also known as a conditional loop or a loop with a condition, is a type of loop in Python where the execution of the loop body is determined by a specific condition.
  • The loop continues to iterate as long as the condition evaluates to True. Once the condition becomes False, the loop terminates, and the program execution continues with the next statement after the loop.

Python provides two types of condition-controlled loops: the while loop and the for loop.

  • In a while loop, the loop body is executed repeatedly as long as a given condition is true.

The syntax for a while loop is as follows:

while condition:
    # Code to be executed

The loop body is denotes under the while statement, and the condition is checked before each iteration. If the condition is true, the loop body is executed, and then the condition is checked again. If the condition becomes false, the loop is exited, and the program continues with the next statement after the loop.

  • In a for loop, the loop body is executed for each item in an iterable object (such as a list, tuple, string, or range).
  • The syntax for a for loop is as follows:
for item in iterable:
    # Code to be executed

The loop variable item takes on the value of each item in the iterable sequentially, and the loop body is executed for each value. Once all the items have been processed, the loop terminates, and the program continues with the next statement after the loop.

Both types of loops provide a way to repeatedly execute a block of code until a specific condition is met, allowing for efficient and controlled repetition for python programs.

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