4. Fill in the code so it adds all integers inputted by the user until the number -1 is inputted & then displays that sum (without the -1 added to the sum.) Also trace your code assuming the user inputs the values 4, 3, 1, -1 sum = 0 sum num
num =

while ( ):

num = int(input("Enter a positive integer (-1 to quit): "))



print(