Finding the sum of numbers from x to y and the program prints the answer as "x+(x+1)....+y= (sum of # from x to y)"

For example, the sum of numbers from 1 to 3 would be printed as 1+2+3=6; the program prints the answer along with the numbers being added together. How would one do this? Any help is greatly appreciated as nothing I've tried has worked. I have been trying to use the sum formula to get the answer and a loop to get the numbers being added together... but with no success. Although the hint is to use for loops, but I'm not sure how to incorporate that into the program. The practice prompt also says that I can't use sum or .join functions :(, I know that would make things so much easier. Omg I'm so sorry for forgetting to mention it.

Solution

Try using this

x = 3
y = 6

for i in range(x, y+1):
    opt_str += str(i) + "+"
    sum += i

print(opt_str[:-1] + "=" + str(sum))

Output:

3+4+5+6=18