Question

(1) Prompt the user to enter four numbers, each corresponding to a person's weight in pounds. Store all weights in a list. Output the list. (2 pts)

Ex:

Enter weight 1: 236
Enter weight 2: 89.5
Enter weight 3: 176.0
Enter weight 4: 166.3

Weights: [236.0, 89.5, 176.0, 166.3]

(2) Output the average of the list's elements. (1 pt)

(3) Output the max list element. (1 pt)

Ex:

Enter weight 1: 236
Enter weight 2: 89.5
Enter weight 3: 176.0
Enter weight 4: 166.3

Weights: [236.0, 89.5, 176.0, 166.3]
Average weight: 166.95
Max weight: 236.0

(4) Prompt the user for a number between 1 and 4. Output the weight at the user specified location and the corresponding value in kilograms. 1 kilogram is equal to 2.2 pounds. (3 pts)

Ex:

Enter a list index (1 - 4): 3
Weight in pounds: 176.0
Weight in kilograms: 80.0

(5) Sort the list's elements from least heavy to heaviest weight. (2 pts)

Ex:

Sorted list: [89.5, 166.3, 176.0, 236.0]

This is what I have so far:

# FIXME (1): Prompt for four weights. Add all weights to a list. Output list.
weights = []
for i in range(4):
w = float(input("Enter weight "+str(i+1)+":"))
weights.append(w)
print("\nWeights:",weights)

# FIXME (2): Output average of weights.
avg = sum(weights) / float(len(weights))
print("Average weight:",avg)

# FIXME (3): Output max weight from list.
print("Max weight:",max(weights))

# FIXME (4): Prompt the user for a list index and output that weight in pounds and kilograms.
index = int(input("\nEnter a list index location (1 - 4): \n"))
print("Weight in pounds:",weights[index-1])
print("Weight in Kilograms:",weights[index-1]/2.2)

# FIXME (5): Sort the list and output it.
weights.sort()
print("\nSorted list:",weights)

Your output starts with

Enter weight 1:

Weights: [236.0]

Enter weight 2:

Weights: [236.0, 89.5].

Enter weight 3:

Weights: [236.0, 89.5, 176.0]

Enter weigt 4:

Weights: [236.0, 89.5, 176.0, 166.3]

Expected output starts with

Enter weight 1:

Enter weight 2:

Enter weight 3:

Enter weight 4:

Weights: [236.0, 89.5, 176.0, 166.3]

How do I fix this!?

Answer 1

It seems to be an indentation problem in the code, due to which print statement is executing after each time you ask for a new weight.. You should print all the weights once you have got all the inputs.. The correct code will be below:

# FIXME (1): Prompt for four weights. Add all weights to a list. Output list.
weights = []

for i in range(4):
        w = float(input("Enter weight "+str(i+1)+": "))
        weights.append(w)

print("\nWeights:",weights)

# FIXME (2): Output average of weights.
avg = sum(weights) / len(weights)
print("Average weight:",avg)

# FIXME (3): Output max weight from list.
print("Max weight:", max(weights))

# FIXME (4): Prompt the user for a list index and output that weight in pounds and kilograms.
index = int(input("\nEnter a list index location (1 - 4): \n"))
print("Weight in pounds:",weights[index-1])
print("Weight in Kilograms:",weights[index-1]/2.2)

# FIXME (5): Sort the list and output it.
weights.sort()
print("\nSorted list:",weights)

**************************************************
Please refer to screenshot above for the indentation..

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