What is Iteration?: a repeating portion of an algorithm, repeats a specified number of times or until a given condition is met

What is an Iteration Statement?: change the sequential flow of control by repeating a set of statements zero or more times, until a stopping condition is met

What does Repeat Until mean?: if the condition evaluates to true initially, the loop body is not executed at all, due to the condition being checked before the loop

Hacks Unit 3 Section 3.8.1

  1. Define an Iteration
  2. Make your own example of an iteration with at least 4 steps and a stopping condition(Similar to mine that I did)
  3. Program a simple iteration.
n = 5
while n > 0:
    n -= 1
    if n == 2:
        break
    print(n)
print('Loop ended.')

4
3
Loop ended.

for x in range(3):
    print(x)
else: 
    print("Final x = %d" % (x))

0
1
2
Final x = 2

def my_range(start, end, step):
    while start <= end:
        yield start
        start += step

for x in my_range(1, 10, 2): # 1 is the starting value of the iteration and 10 is where it will end aka its max. The step is what the list will be printing/going for, for example when I change it to 2 it will start counting by twos from the starting value.
    print(x)

1
3
5
7
9

Hacks Unit 3 Section 3.8.2

  1. What is an iteration statement, in your own words?
  2. Create a descending list of numbers using for loop
  3. Using while loop, make a list of numbers which will form an output of 3,16,29,42,55,68,81
def mylist(start, end, step):
    while start <= end:
        yield start 
        start -= step

for x in mylist(3, 81, 4):
    print(x)

HACKS Unit 3 Section 10

Find the lowest value in a list (Luna Iwazaki)

  • Use the list made bellow
  • Make a variable to hold the minimum and set it to potential minimum value
  • Loop
  • Check each element to see if it is less than the minimum variable
  • If the element is less than the minimum variable, update the minimum
  • After all the elements of the list have been checked, display the minimum value
nums = ["10", "15", "20", "25", "30", "35"]
min_number = None

for number in nums:
    if min_number is None or number < min_number:
        min_number = number

print(min_number) 

10

Lists Quiz (Ethan Tran)

Take a screenshot of your score on put it on your review ticket!