Given two ints a and b, add all the numbers between a and b, inclusive. So if a is 4 and b is 7, the result should be 22, the result of 4+5+6+7. Precondition: a < b (a is guaranteed to be less than b for all inputs).

HINTS

Think about the pieces of a for loop; the declaration and initialization of the loop control variable, the condition and the update. Does the loop control variable have to start at 0 every time? Supposing that the condition is some kind of inequality, are there choices about what kind of inequality to use?

About adding number sequences: There are several non-looping ways to solve this problem and all the ones that follow it, which you shouldn't use the first time you solve them. Doing this in various non-looping ways is described at the following page:

https://betterexplained.com/articles/techniques-for-adding-the-numbers-1-to-100/