the sum of all the integers k such that – 23 < k < 24 is
"- 22 - - - - - - - - - - - - - - - - - - 0 - - - - - - - - - - - - - - - - - 23 values upto + 23 cancels outwe are left with only - 22 - 21 sum of which is - 43 . hence option d . b"
add(add(negate(23), const_1), add(add(negate(23), const_1), const_1))