Learning Outcomes

A loop repeats an action until a condition is met. What is a loop?

• A sequence of instructions that is continually repeated until a certain condition is reached.

• A single execution of a set of instructions.

• A type of variable used in programming.

• A method to store data in a database.

Write a basic Python loop (using for) to repeat a simple task. Goal: You will write a basic Python loop (using for) to repeat a simple task. Example: Print your name 3 times.

• for i in range(3): print('Your Name')

• while i < 3: print('Your Name')

• print('Your Name' * 3)

• repeat 3 times: print('Your Name')

Fill in the blank: A loop is a piece of code that runs again and again until we tell it to ____.

• stop

• start

• pause

• continue

A for loop is used to:

• Iterate over a sequence of elements

• Define a function

• Store data in a variable

• Terminate a program

What does the following code do? for i in range(5): print('Hello, world!')

• Prints 'Hello, world!' 5 times

• Prints 'Hello, world!' 4 times

• Prints 'Hello, world!' 6 times

• Does not print anything

In the code example, what does 'range(5)' do?

• Creates a list of numbers: 0, 1, 2, 3, 4

• Creates a list of numbers: 1, 2, 3, 4, 5

• Creates a list of numbers: 0, 1, 2, 3, 4, 5

• Creates a list of numbers: 1, 2, 3, 4

Change the code to print your name 3 times. for i in range(3): print("Your Name")

• for i in range(3):\n print("Your Name")

• for i in range(3):\n print("My Name")

• for i in range(3):\n print("Your Name" * 3)

• for i in range(3):\n print("My Name" * 3)

A while loop is:

• a loop that executes a block of code as long as a specified condition is true.

• a loop that executes a block of code a specific number of times.

• a loop that executes a block of code until a specific condition becomes true.

• a loop that executes a block of code indefinitely.

Exercise 1: Print Numbers 1 to 10 Task: What will be the output of the following code snippet? ```python for i in range(1, 11): print(i) ``` Hint: Use range(1, 11).

• 1 2 3 4 5 6 7 8 9 10

• 10 9 8 7 6 5 4 3 2 1

• 1 3 5 7 9

• 2 4 6 8 10

Which of the following while loops correctly prints even numbers from 2 to 20?

• while (i <= 20) { if (i % 2 == 0) { print(i); } i++; }

• while (i < 20) { print(i); i += 2; }

• while (i <= 20) { print(i); i += 2; }

• while (i < 20) { if (i % 2 == 0) { print(i); } i++; }