entry = 0 # Ensure the loop is entered
sum = 0 # Initialize sum

print("Enter numbers, enter -999 to end loop:")
while entry != -999: 
    entry = int(input()) # Get the value
    if entry != -999: 
        sum += entry # Only add it if it is not -999
        print ('You entered',entry)
print("Sum =", sum) # Display the sum

print("----------------")