Question

I need help getting my program to reject a negative input from the user.

Here is what I have:

#short description of what the program will do
print("Hello, this program will ask you to enter a non-negative decimal integer. The program will then show the binary equivalent of the integer you choose.")

#ask the user to enter the non-negative decimal integer
number= int(input("Enter a non-negative decimal integer: "))
while number< 0:
print("Number Cannot Be Negative!! Try again...")
#create a variable containing an empty character string
output=' '
#create a copy of user's variable named "working"
working = number
#reject input less than zero

while True:
#if working number is odd, prepend "1" to string variable
if working%2==1:
output="1"+output
else:
output="0"+output #if working number is even, preven "O" to string variable
#print working number and character string   
print(str(working) + " " + output)
#divide working number by 2, throwing away remainder
working//=2
#stop when working number gets to zero
if working==0:
break
#print user's original number and it's binary representation
print("I think your original binary number " + str(number) + " is " +output+ " in binary.")

Thank you

Answer 1

The answer to this question is as follows:

The code is as follows:

print("Hello, this program will ask you to enter a non-negative decimal integer. The program will then show the binary equivalent of the integer you choose.")
number= int(input("Enter a non-negative decimal integer: "))
while number< 0:
print("Number Cannot Be Negative!! Try again...",number)
break
output=' '
working = number

while number>0:
if working%2==1:
output="1"+output
else:
output="0"+output
print(str(working) + " " + output)
working//=2
if working==0:
break
print("I think your original binary number " + str(number) + " is " +output+ " in binary.")

The input and output is provided in the screenshot below: