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Programming Loops Basics

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Questions and Answers

What is the primary purpose of using loops in programming?

To make the code longer for clarity

To create confusion in program flow

To execute instructions repeatedly without redundancy (correct)

To use more system resources than needed

In Python, which type of loop is indicated to be an indefinite loop?

while loop (correct)

for loop

do-while loop

nested loop

What will happen if the condition in a while loop evaluates to False?

The statements inside the loop will be executed

The loop will execute at least once regardless of the condition

The program will enter an infinite loop

Program control will exit the loop and proceed to the next statement (correct)

Which statement correctly defines the syntax of a while loop in Python?

<p>while condition: statements</p> Signup and view all the answers

How can we describe the flow of control in a while loop?

<p>It first checks the condition, then executes the statements if True</p> Signup and view all the answers

Study Notes

Loops

Loops are statements that repeat a block of code until a certain condition is met
Loops help to reduce code redundancy and make programs more efficient

Types of Loops

while loop: Repeats a block of code as long as a condition is true
- Indefinite loop - the number of iterations is unknown until runtime
- Condition is evaluated before each iteration
- If the condition is true, the loop body executes
- If the condition is false, the loop terminates
- Syntax: while condition:
Example: Print "Hello, World!" 5 times*
- Initialize a variable num_of_times to 1
- Use a while loop with the condition num_of_times <= 5
- Inside the loop:
  - Print "Hello, World!"
  - Increment num_of_times by 1
  - When num_of_times is greater than 5, the loop terminates

Flow Diagram of a while Loop

The loop checks the condition,
If the condition is true, the code inside the loop executes,
The loop iterates again to check the condition,
If the condition is false, the loop terminates,
Control jumps to the next statement after the loop.

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Description

This quiz covers the fundamentals of loops in programming, focusing on while loops. You'll learn about their structure, how they function, and explore an example demonstrating their use. Perfect for beginners looking to understand coding efficiency.