Use a loop and random.randint() to generate a list of ten random_numbers between 1 and 100.
Count the even numbers
Solution
import random
# generate 10 random numbers between 1 and 100
numbers = []
for i in range(10):
numbers.append(random.randint(1,100))
# count the even numbers in the list
# create empty list for evens
evens = []
# loop through the numbers
for number in numbers:
# check if the number is even
if number % 2 == 0:
# add it to the evens list
evens.append(number)
# calculate the number of evens
evens_count = len(evens)
# display result
result = f'''Numbers: {numbers}
There are {evens_count} evens: {evens}'''
print(result)Output
Numbers: [64, 3, 55, 94, 40, 56, 40, 69, 54, 3]
There are 6 evens: [64, 94, 40, 56, 40, 54]
Reverse the list using a loop and without any methods or built-in functions
Solution
import random
# generate 10 random numbers between 1 and 100
numbers = []
for i in range(10):
numbers.append(random.randint(1,100))
# calculate the length of the numbers list
numbers_length = len(numbers)
# blank list for reverse
numbers_reversed = []
# loop backwards over one less than the length
for index in range(numbers_length - 1, -1, -1):
# get the current number
number = numbers[index]
# add it to the reversed list
numbers_reversed.append(number)
# display result
result = f'''numbers: {numbers}
reversed: {numbers_reversed}'''
print(result)Output
numbers: [62, 23, 56, 30, 55, 60, 31, 91, 93, 45]
reversed: [45, 93, 91, 31, 60, 55, 30, 56, 23, 62]
Sort the list of numbers in ascending order without using methods or built-in functions.
Solution
numbers = [62, 23, 56, 30, 55, 60, 31, 91, 93, 45]
# print before sorting
print(f'numbers: {numbers}')
# loop: i = 0 -> (length of list - 1)
for i in range(len(numbers) - 1):
# set 'swap' variable to False
swap = False
# loop: j = 0 -> (length of list - 1)
for j in range(len(numbers) - 1):
#if list[j] is less than list[j+1]
if numbers[j] > numbers[j+1]:
#place list[j] in a 'bubble' variable
bubble = numbers[j]
# put list[j+1] at list[j]
numbers[j] = numbers[j+1]
# put bubble at list[j+1]
numbers[j+1] = bubble
# since a swap occured this loop,
# set swap to True
swap = True
# if no swap occured, break the outer loop
if not swap:
break
# print after sorting
print(f'sorted: {numbers}')Output
numbers: [62, 23, 56, 30, 55, 60, 31, 91, 93, 45]
sorted: [23, 30, 31, 45, 55, 56, 60, 62, 91, 93]
Keep in mind that is is just one potential solution