# Write a Python program that continuously asks the user to enter positive numbers.
# If the user enters a negative number or zero, the loop stops,
# and the program prints the sum of all positive numbers entered.
user_number = int(input('Enter a number: '))
sum_numbers = 0
while user_number > 0:
sum_numbers += user_number
user_number = int(input('Enter a number: '))
print(f'Sum: {sum_numbers}')
