Question about list and while function

[doug2019]

I am trying to code a list of 10 items whose values ​​come from the equation y=a*(b-x) and complete the rest of it with 0. e.g:

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a=1 b=5 list=[] x=0 while (x<=b):       x=x+1       y=a*(b-x)       break list.append(y) list=[1,2,3,4,5,6,0,0,0,0,0]

[stullis]

With your current code, you only need to remove "break" and fix the indenting to make it work. Then, we can use list.extend() to add the zeroes. On a related note, do not use reserved or implemented terms such as "list" as variable names. That has unintended consequences.

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a=1 b=5 list_=[] x=0 while (x<=b):     x=x+1     y=a*(b-x)     list_.append(y) list_.extend([0] * b)

That said, we can do better. As a general practice, avoid while loops. They have a tendency to become infinite loops when there's a bug. Instead, use for loops. A for loop is guaranteed to stop because it has a limited iteration. We can also implement x without a counter, cutting two lines out of the code, by implementing a for loop.

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a=1 b=5 list_=[] for x in range(1, 5):     y=a*(b-x)     list_.append(y) list_.extend([0] * b)

But we can do even better! This is a more advanced technique. We have list comprehensions at our disposal. They're more efficient and sleek.

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a=1 b=5 list_=[a * b - x for x in range(1,5)] list_.extend([0] * b)

[doug2019]

I understand but the problem is that list must always have 10 elements and "a" and "b" will be input by the user.

[adt]

the problem is that list must always have 10 elements and "a" and "b" will be input by the user

Will this meet your needs?

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a = 1 b = 5 mlist= [0]*(a - 1) + [a * (b - x) for x in range(a, b+1)] + [0]*(10 - b) print(mlist)

Output:
[4, 3, 2, 1, 0, 0, 0, 0, 0, 0]

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If you need to have the calculated values in ascending order, you could try the following:

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a = 1 b = 5 mlist= [0]*(a - 1) + [a * (b - x) for x in range(b, a-1, -1)] + [0]*(10 - b) print(mlist)

Output:
[0, 1, 2, 3, 4, 0, 0, 0, 0, 0]

[adt]

If values of a & b are not restricted to within 10 (while their difference is so), and padding of zero values is only to be on the right side, you could try the following:

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a = 12 b = 18 mlist= [a * (b - x) for x in range(b, a-1, -1)] + [0]*(10 - (b - a + 1)) print(mlist)

Output:
[0, 12, 24, 36, 48, 60, 72, 0, 0, 0]

[jefsummers]

For the more general answer, how about

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a = int(input("Enter a: ")) b = int(input("Enter b: "))   answer = [a * b - x for x in range(1,b+1)] answer.extend([0] * (10-b))   print(answer)

Output:
Enter a: 3
Enter b: 6
[17, 16, 15, 14, 13, 12, 0, 0, 0, 0]

That works for any positive value of b < 10

[doug2019]

Thank you so much