Question

Write a Python program that:

1. Create the algorithm in both flowchart and pseudocode forms for the following requirements:
2. Reads in a series of positive integers,  one number at a time;  and
3. Calculate the product (multiplication) of all the integers less than 25,  and
4. Calculate the sum (addition) of all the integers greater than or equal to 25.
5. Use 0 as a sentinel value, which stops the input loop. [ If the input is 0 that means the end of the input list. ]
6. After all the data is entered, then display the resulting sum and product values with labels.   ** Added **
7. Once you completed the algorithm, then code the program in Python.
8. 2 forms of the algorithm, plus the python source (*.py file listing) and a screenshot of the running program.

Hint: For each input number - if the number is < 25  then multiply it times the overall product, else if it is >= 25 then add it to the overall sum. Be sure to initialize the product and sum it to appropriate initial values.

Answer 1

Ok, I will give the answer completely,

python program(I had included comments for better understanding, also please refer the screenshot of the code, attached below , of you are having trouble in understanding the indentation)

# Initialize product and sum initial values
productResult = 1
sumResult = 0 

# read the inputs from the user
while True:
  n = int(input("Enter a positive integer, 0 to quit : "))
  if n<0:
    print("Invalid value, enter positive integer")
    continue
  if n ==0:
    break
  if n < 25:
    productResult = productResult * n
  else:
    sumResult = sumResult + n
# Now the program is out of the loop, display the results
print(f"The resultant sum : {sumResult}")
print(f"The resultant product : {productResult}")

Screenshot of the code :

Screenshot of the output :

Algorithm :

STEP 1  : INITIALIZE THE VARIABLE productResult AS 1
STEP 2  : INITIALIZE THE VARIABLE sumResult AS 0
STEP 3  : READ N
STEP 4  : REPEAT UNTIL N NOT EQUAL TO 0
STEP 5  :       IF N < 0
STEP 6  :         THEN, PRINT "Invalid value, enter positive integer" AND GO THE STEP 4
STEP 7  :       IF N < 25
STEP 8  :         THEN, SET : productResult = productResult * n
STEP 9  :       IF N>=25
STEP 10 :         THEN, SET : sumResult = sumResult + n
STEP 11 :       READ N
STEP 12 : PRINT "The resultant sum :",sumResult
STEP 13 : PRINT "The resultant product :",productResult

FLOWCHART :