print("Hello!") #Prints hello
number=int(input("Please enter a number: ")) #lets you input a number
count=number


while number!=-1: #loops around when number is not equal to -1
    while number<-1:
        print("You can not enter a negative number please try again")#print a sentence
        number=int(input("Please enter a number: ")) #lets you input number
    number=int(input("Please enter a number: ")) #lets you input number
    count=count+number #Adds the count to the number that has been given
           
print("The total is {0}".format(count))          
print("Goodbye")