Adding numbers from a loop?

Question

Java

Help me please!
It is necessary to calculate the sum of all numbers in a given interval, inclusive. If the beginning of the interval exceeds the end, then it is necessary to perform the calculation in the reverse order. For example, the sum of numbers from 1 to 5 is 1+2+3+4+5=15 and vice versa 5+4+3+2+1=15 using a loop.
How to write correctly, otherwise I can’t do it ..
Thank you.

Answer 1

Compare numbers.
If a > b, then loop from b to a.
And vice versa.