What does this square bracket and parenthesis bracket notation mean [first1,last1)?
mathematical-notation
Solution
A bracket - `[` or `]` - means that end of the range is inclusive -- it includes the element listed. A parenthesis - `(` or `)` - means that end is exclusive and doesn't contain the listed element. So for `[first1, last1)`, the range starts with `first1` (and includes it), but ends just before `last1`.
Assuming integers:
- (0, 5) = 1, 2, 3, 4
- (0, 5] = 1, 2, 3, 4, 5
- [0, 5) = 0, 1, 2, 3, 4
- [0, 5] = 0, 1, 2, 3, 4, 5
Problem
I have seen number ranges represented as `[first1,last1)` and `[first2,last2)`. I would like to know what such a notation means.