A function which sums integers between 1 and some defined upper limit end

sum_from1_py

'''
Written 6-23-2018 s.m.d
Implementation of EdX Introduction to Computation & Programming Using Python
'''
# initialization state: grand_sum, incrementer, end
def sum_total(end):
    grand_sum = 0
    incrementer = 1
    end = input("Enter a positive integer please, any positive integer") # instantiate and upper limit integer
    end = int(end) # convert end to an integer type
    while incrementer <= end:
        grand_sum = incrementer
        incrementer += 1
    return(grand_sum)    

print(sum_total)