Logic for getting number of pages

Question

If a page can have 27 items printed on it and number of items can be any positive number then how can I find number of pages if I have number of items, I tried Modulus and division but didn't helped.

double TotalNumberOfPages = NumberOfItems/27;
int a = (int)TotalNumberOfPages;

above code works but not logically as if double is 3.00000000000001 I want it to round up as 4 not 3, for some reason I can't use "round" method.

You want to round 3.00000000000001 up to 4? It's hard to get much closer to 3 than 3.00000000000001... — Yatrix, Oct 30 '12 at 16:55

score 9 · Accepted Answer · answered Oct 30 '12 at 16:51

9

Surely your TotalNumberOfPages should be an integer. In that case, try:

int PageSize = 27;
int TotalNumberOfPages = (int)Math.Ceiling((double)NumberOfItems / (double)PageSize);

answered Oct 30 '12 at 16:51

Jez

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The most important part of your answer is the call to `Math.Ceiling`, not the type conversion. – Zebi Oct 30 '12 at 16:57

score 2 · Answer 2 · answered Oct 30 '12 at 16:53

2

(NumberOfItems + ItemsPerPage - 1) / ItemsPerPage;

In your case ItemsPerPage = 27

answered Oct 30 '12 at 16:53

Igor

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if NumberOfItems is double use (int)NumberOfItems. I'm not sure why downvote :) – Igor Oct 30 '12 at 16:57

Logic for getting number of pages

2 Answers2