Edhesive 4.1 - 4.11
This flashcard set covers essential concepts from Unit 4 of an introductory Python programming course, focusing on loops, control flow, and simulations. Designed for students learning to code, the cards review while and for loops, the use of range(), user input handling, summation and counting patterns, and basic computer modeling principles.
4.1 Lesson Practice
We use loops to:
Repeat blocks of code
Key Terms
4.1 Lesson Practice
We use loops to:
Repeat blocks of code
4.1 Lesson Practice
Consider the following code:
num = int(input("Enter a number, negative to stop"))
while (num >= 0):
print ("You entered: " + str(num))
num = int(input("Enter a number, negative to stop"))
print ("Done.")
What is wrong?
The line num = int(input("Enter a number, negative to stop")) should be indented so it is inside the loop
4.1 Code Practice
name = input("Please enter a name, Nope to end ")
while (name != "Nope"):
print ("Nice to meet you " + name)
name = input("Please...
4.2 Lesson Practice
What is output? Select all that apply.
c = 0
while (c < 10):
c = c + 5
print (c)
5 and 10
4.2 Lesson Practice
What is output? Select all that apply.
c = 3
while (c < 10):
c = c + 2
print (c)
5, 7, 9 and 11
4.2 Lesson Practice
What is output?
c = 1
sum = 0
while (c < 10):
c = c + 3
sum = sum + c
print (sum)
21
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| Term | Definition |
|---|---|
4.1 Lesson Practice We use loops to: | Repeat blocks of code |
4.1 Lesson Practice Consider the following code: num = int(input("Enter a number, negative to stop")) while (num >= 0): print ("You entered: " + str(num)) num = int(input("Enter a number, negative to stop")) print ("Done.") What is wrong? | The line num = int(input("Enter a number, negative to stop")) should be indented so it is inside the loop |
4.1 Code Practice | name = input("Please enter a name, Nope to end ") while (name != "Nope"): print ("Nice to meet you " + name) name = input("Please enter a name, Nope to end ") print ("Done") |
4.2 Lesson Practice What is output? Select all that apply. c = 0 while (c < 10): c = c + 5 print (c) | 5 and 10 |
4.2 Lesson Practice What is output? Select all that apply. c = 3 while (c < 10): c = c + 2 print (c) | 5, 7, 9 and 11 |
4.2 Lesson Practice What is output? c = 1 sum = 0 while (c < 10): c = c + 3 sum = sum + c print (sum) | 21 |
4.2 Lesson Practice What should be entered to make the loop print 60 70 80 x = 50 while (x < 80): x = x + ____ print (x) | 10 |
4.2 Code Practice: Question 1 | sum = 0 count = 0 while (sum <= 100): count +=1 num = int(input("Enter a number: ")) sum += num print("Sum: " + str(sum)) print("Numbers entered: " + str(count)) |
4.2 Code Practice: Question 2 | pet = input("What pet do you have?") count = 0 while (pet!= "rock"): count +=1 print ("You have a " + str(pet) + " with a total of " + str(count) + " pet(s)") pet = input("Enter pet: ") |
4.3 Lesson Practice Consider the following code: x = int(input ("Enter a value: ")) c = 0 sum = 0 while (c < 10): x = int(input ("Enter a value: ")) c = c + 1 sum = sum + x print ("\n\nSum: " + str(sum)) What type of loop is it? | Count variable loop |
4.3 Lesson Practice This code loops until the user types in 17. It finds and prints the sum of all even numbers entered. n = int(input ("Enter a number, 17 to stop.")) sum = 0 while (n != 17): if (n % 2 == 0): sum = sum + n n = int(input ("Enter a number, 17 to stop.")) print ("Sum: " + str(sum)) This is an example of a(n) ____ loop | user input |
4.3 Lesson Practice Suppose you change the program in the last problem so the user enters exactly 17 numbers. The loop would then be an example of a(n) _____ loop | count variable |
4.3 Code Practice: Question 1 | age = int(input("How old are you?")) for i in range(1,age+1): print("*HUG*") |
4.3 Code Practice: Question 2 | i = 3 while i <=21: if i % 3 == 0: print(i) i+=1 |
4.5 Lesson Practice We use loops: | To repeat a section of code |
4.5 Lesson Practice What are the two ways to end a loop? (Select two answers.) | Count variable Using user input |
4.5 Code Practice (dont reccomened using this) | i = 0 while True: word=input("Please enter the next word: ") if word == "STOP": break i += 1 print("#{}:You entered{}".format(i, word)) print("All done. {} words entered.".format(i)) |
4.6 Lesson Practice Range is an example of a ______________. | function |
4.6 Lesson Practice The range function must have two parameters? | False |
4.6 Lesson Practice What list of numbers is created by the following code? range(8) | 0 1 2 3 4 5 6 7 |
4.6 Lesson Practice What list of numbers is created by the following code? range(4, 11) | 4 5 6 7 8 9 10 |
4.6 Lesson Practice n Practice Which range function creates the following list of numbers? 24 27 30 33 36 39 | range(76, 60, -2) |
4.7 Lesson Practice A for loop is used to replace a ________ while loop. | counting |
4.7 Lesson Practice The following loop is intended to print the numbers 1, 2, 3, 4, 5.Fill in the blank: for i in _____ (1, 6): print (i) | range |
4.7 Lesson Practice When do you use a for loop instead of a while loop? (Select multiple answers) | You know how many times you want the loop to run When there is a definite starting and ending point |
4.7 Lesson Practice What is wrong with the following code? for range(7, 10): print(x) | The first line should be for x in range(7, 10): |
4.7 Lesson Practice What is output by the following code? for x in range(7, 16): print(x * 2, end=" ") | 14 16 18 20 22 24 26 28 30 |
4.7 Code Practice: Question 1 | for i in range(20, 31): print(i, end=" ") |
4.7 Code Practice: Question 2 | for i in range(56, 71): print(i, end=" ") |
4.8 Lesson Practice Which range function will create a list with all odd numbers between 5 and 77? | range(5, 78, 2) |
4.8 Lesson Practice What is output by the following code: for i in range(41, 31, -1): print(i) What is output? | All numbers from 41 to 32 counting counting backwards |
4.8 Lesson Practice Consider the following code: for r in range (10, 60, 10): print("Hello") How many times is the word "Hello" output? | 5 |
4.8 Code Practice: Question 1 | for I in range(5, 76, 5): print(I, end=" ") |
4.8 Code Practice: Question 2 | for i in range(88,40,-4): print(i, end=' ') |
4.8 Code Practice: Question 3 | for i in range(200, 300+1, 2): print(i) |
4.9 Lesson Practice ____________ means to set a variable equal to a known value before a loop. | Initialize |
4.9 Lesson Practice Consider the following code: start = int(input("Enter the starting number: ")) stop = int(input("Enter the ending number: ")) x = -10 sum = 0 for i in range (start, stop, x): sum = sum + i print(sum) What is output if the user enters 78 then 45? | 252 |
4.9 Lesson Practice What is output by the following code? sum = 0 for i in range (3, 15, 3): sum = sum + i print ("Sum = " +str( sum)) | Sum = 30 |
4.9 Lesson Practice A ___________ variable is used to add up a set of values. | sum |
4.9 Code Practice: Question 1 | out = 0 for i in range(3, 67, 3): out += i print(out) |
4.9 Code Practice: Question 2 | count = 0 for x in range(20, 100, 10): count += x print(count) |
4.9 Code Practice: Question 3 | result = 0 for i in range(99, 0, -1): result += i print(result) |
4.9 Code Practice: Question 4 | print('Enter ten temperatures please') sum = 0 for i in range(10): T = float(input()) sum = sum + T print('Sum is: ',sum) |
4.10 Lesson Practice Questions 1 - 3 refer to the following code: maximum = 0 for i in range (10): n = int(input("Enter a number: ")) if (n >= 0 and n > maximum): maximum = n print(maximum) How many variables are in the program? | 3 |
4.10 Lesson Practice Trace the code. What does the program do? | Finds the largest positive number of the numbers entered |
4.10 Lesson Practice What would happen if only negative numbers are entered in the program? | Zero is output. |
4.11 Lesson Practice Computer __________ are used to represent a real world situation using a computer. | models |
4.11 Lesson Practice ____________ run experiments using computer models. | simulations |
4.11 Lesson Practice Which of the following is NOT a use of computer simulations: | To calculate the area of an oval room |
4.11 Lesson Practice _________ _________ _________ use random numbers made by computers to test computer models. | Monte Carlo Methods |
4.11 Lesson Practice Computer simulations were first developed during as a part of the | 4.11 Lesson Practice Computer simulations were first developed during as a part of the . Answer 1:WWII Answer 2:Manhattan Project |