Lesson 2.4– Loops.pdf

exercises 2.4.pdf

#repetitionEx1.py

fail = 0
classes = int(input("enter # of classes: "))

for i in range (classes):
    mark = int(input("enter mark: "))
    if mark <= 50:
        fail += 1

print (f"you are failing {fail} classes")

#repetitionEx2.py

	total_squares = 64
grains_per_pound = 7000

total_grains = 0
grains_on_square = 1

for square in range(total_squares):
    total_grains += grains_on_square
    grains_on_square *= 2

total_pounds = total_grains / grains_per_pound

print(f"The total number of grains is: {total_grains}")
print(f"The total weight in pounds is: {total_pounds:.2f}")

#repetitionEx3.py

joe = int(input("ballots for joe: )"))
bob = int(input("ballots for bob: )"))
bill = int(input("ballots for bill: )"))

if joe>bob and joe> bill:
    print("joe won")
elif bob>joe and bob> bill:
    print("bob won")
if bill>bob and bill> joe:
    print("bill won")
else: 
    print("there is a tie")

total = joe + bob + bill
print(f" bob earned {bob/total:.2f}% of the votes")
print(f" joe earned {joe/total:.2f}% of the votes")
print(f" bill earned {bill/total:.2f}% of the votes")

#repetitionEx4.py

distance = 384400000    # in meters

folds = 0
length = 0.0001         # in meters
total = 0

while total < distance:
    folds += 1
    length *= 2
    total += length
print (f" it'll take {folds} to reach the moon")