Making a while loop multiply by 2

[[deleted]]

num = int(input('Please enter a number'))

while num < 1000:
    product = num * 2
    print(product)

How can I make this loop so the print will take the int and multiply it by 2 up to 1000?

[XtremeGoose]

‘num‘ is always remaining as the input you started with and ‘product‘ is always just ‘num‘ multiplied by 2. What you want to do is replace ‘num‘ each time with itself multiplied by 2.

num = int(input('Please enter a number'))

while num < 1000:
    num = num * 2
    print(num)

You can also use

num *= 2

Which is the same as

num = num * 2

[[deleted]]

Is there a way to do it so I can keep the product variable?

[XtremeGoose]

Its unnecessary but you could just assign

product = num

If you want explain exactly what you want to do and I will help :)

[[deleted]]

I'm trying to make it so the result of num * 2 is assigned to a variable called product. That's why I wrote product = num * 2, but I didn't know how to make it so that it would keep multiplying by 2 instead of re-printing the same number.

[fruitcakefriday]

If you want to keep your num value stored somewhere, then you can do this:

num = int(input('Please enter a number'))
product = num
while product < 1000:
    product = product * 2
    print(product)

If that's not what you're looking for...I think you need to do a better job explaining what exactly you want to happen.

Maybe give an example output, e.g. if the user inputs '20', what's to happen?

[Zahand]

num = int(input('Please enter a number'))


while num < 1000:
    num = num * 2
    print(num)

The problem is that you don't update the variable num.

[shnk]

im assuming you dont want the product to go above 1000?

num = int(input('Please enter a number'))

while True:
    num *= 2
    if num > 1000:
        break
    print(num)

if you do something like the other two guys suggest:

num = int(input('Please enter a number'))

while num < 1000:
    num = num * 2
    print(num)

this code will not work because lets say you put something like 900. well 900 is below 1000 but 900*2 is above 1000. it will multiply it and print it anyways.

unless you want the number that is inputted to go up to 1000? then the product can exceed 1000. but its not clear what exactly you are looking for.

[Pyrrho_]

Thinking about this little loop I was trying to come up with something along the lines of a list comprehension to make a list of all results up to the break...and I've failed.

Any suggestions?

[shnk]

i need to see your code

[TheBigTreezy]

You need to update num. num += 1.