+ 1

Why choose to code range(n,m) as stopping at m-1?

9th Jun 2017, 4:43 PM
Olivier Casse
Olivier Casse - avatar
2 Respuestas
+ 5
I guess either way you do it is ok, but there are a few things to be said about stopping at m-1. In the most common case (n == 0) stopping at m-1 has the advantage that you can read without having to calculate how often the loop will run. for i in range(0, 10): # runs 10 times This is also consistent with other languages which don't have `range` and use oldschool for loops: for(int i = 0; i < 10; i++); // runs 10 times for(int = 0; i < array.size(); i++) // runs array.size() times And having to use (array.size() - 1) every time would of course be silly. It makes sense for python to go that route since that is what programmers are used to anyway!
9th Jun 2017, 4:54 PM
Schindlabua
Schindlabua - avatar
+ 3
Also, this is so that range(m, n) doesn't overlap with range(n, k).
9th Jun 2017, 5:24 PM
Igor B
Igor B - avatar