How to Accurately Calculate Page Count for Pagination in C# and Java?

Calculating Page Count for Pagination with Integer Division Rounding

When displaying paginated data, it's crucial to determine the number of pages required based on the total number of items and the items per page. However, integer division can result in truncated results, which may lead to incorrect pagination behavior.

In languages like C# and Java, how can we round up the result of integer division to ensure a sufficient number of pages?

Solution:

To elegantly round up the result of integer division, we can utilize the following formula:

pageCount = (records + recordsPerPage - 1) / recordsPerPage;

This formula adds a fractional portion to the result of the integer division, which effectively rounds up the result to the nearest integer.

Example:

If we have 107 items and want to display 10 items per page, the formula would yield the following:

pageCount = (107 + 10 - 1) / 10 = 11

This result indicates that 11 pages are needed to accommodate all 107 items.

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