What is the difference in floor function and truncate function?

Question

What is the difference between Math.Floor() and Math.Truncate() in .NET?

For example, Math.Floor(4.4) = 4 Math.Truncate(4.4) = 4.

Any chance you checked the .net documentation first? – zerkms Apr 02 '17 at 23:27 — zerkms, Apr 02 '17 at 23:27

score 2 · Answer 1 · answered Apr 02 '17 at 23:29

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These function behave differently for negative numbers.

Math.Truncate(-4.5) = -4

Math.Floor(-4.5) = -5

answered Apr 02 '17 at 23:29

Sylvain

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score -1 · Answer 2 · answered Apr 02 '17 at 23:28

-1

Math.Floor rounds down Math.Ceiling rounds up and Math.Truncate rounds towards zero. Thus, Math.Truncate is like Math.Floor for positive numbers, and like Math.Ceiling for negative numbers.

answered Apr 02 '17 at 23:28

Ray Wang

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Copying from a different answer without reference is no good style – NineBerry Apr 04 '17 at 19:39

What is the difference in floor function and truncate function?

2 Answers2