While True Problem

[StingingNeedles]

I am new to python and I am trying some practice problems and I can get this one to work:

-Prompt user for an integer between 1 and 10 and re-prompt if the input is not in this range
-Print that many "&", one per line

I know I need to use while True to make this work, but I can get it to loop more than a single &.

Any help would be appreciated, thanks.

[deanhystad]

"while True:" is going to run over and over and over. The tricky part is getting it to stop.

One way to break out of the loop is to "break" out of the loop.

import random

while True:
    value = random.randint(0, 10)
    if value == 5:
        break
    print(value)

This loop will print random numbers in the range 0..10 until the random number is 5. It then exits the loop without printing 5.

Inside a function you have an additional option; return. This loop counts how many random numbers are generated before the random number == value and returns the count.

import random

def counter(value, max_=10):
    counter = 1
    while True:
        counter += 1
        if random.randint(0, max_) == value:
            return counter

print(counter(5, 11))

You'll have to decide what get placed inside the loop and how to exit the loop.

[perfringo]

Modern Python has walrus operator so we can replace while True: with this:

while (num := int(input('Enter number: '))) != 5:
       print(f'Number must be 5 but you entered {num!r}')

Note that this crashes if user enters something which can't be converted into int; it can be written without walrus as well but then there is no access/reference to the value user entered.

[StingingNeedles]

i = int(input('Integer Between 1 & 10: '))

while True:

if i == 1:
print('&', end='\n')
elif i == 2:
print('&',end='\n')
print('&',end='\n')
elif i == 3:
print('&',end='\n')
print('&',end='\n')
print('&',end='\n')
elif i == 4:
print('&',end='\n')
print('&',end='\n')
print('&',end='\n')
print('&',end='\n')

This is the road I am going down, but I know there is a better way to loop this. Also, I need to figure out how to re-prompt the first line if they enter a number that is not between 1-10.

[deanhystad]

You have the while loop in the wrong place. You are supposed to prompt the user for input until then enter a number between 1 and 10. You politely request them to do so, but nothing in you program enforces the thing they enter is a number, much less a number from 1..10.

Your program should look something like this:

while True:
    num = get input
    if num in range 1 to 10
        break
print('&'*num)

Now go figure out these parts:
num = get input # <- You have a good start, but what if user enters 'one'?
if num in range 1 to 10 # <- You have not done anything to test this

[StingingNeedles]

You have the while loop in the wrong place. You are supposed to prompt the user for input until then enter a number between 1 and 10. You politely request them to do so, but nothing in you program enforces the thing they enter is a number, much less a number from 1..10.

Your program should look something like this:

while True:
    num = get input
    if num in range 1 to 10
        break
print('&'*num)

Now go figure out these parts:
num = get input # <- You have a good start, but what if user enters 'one'?
if num in range 1 to 10 # <- You have not done anything to test this

Okay, thanks for the help. This is making more sense now. How do I loop the "&"? For example if the person enters 4, I want to print:

&
&
&
&

[deanhystad]

Look at for loop.

[StingingNeedles]

Look at for loop.

while True:

i = int(input('Integer Between 1 & 10: '))

if i in range (1,11):

break

for i in range (1,11):


print('&', end='\n')

Here is where I am at now. It it re-promting correctly if a value is entered that is not 1-10, but when 1-10 is entered it is not printing anything. I know I am missing the second half of the For Loop, but I can't figure out what it is.

[deanhystad]

Please use python tags when posting code.

This does not do what you think it does:

if i in range (1,11):

and why are you doing this?

for i in range (1,11):

I think being near a keyboard is messing you up. Put away the code for a while and do a little research. Formulate an algorithm to solve your problem. Write it down! Then, and only then begin work to convert you algorithm to Python code.