I need to round up to the nearest tenth. What I need is ceil

Question

Editorial Team

Asked: May 25, 20262026-05-25T06:08:56+00:00 2026-05-25T06:08:56+00:00

I need to round up to the nearest tenth. What I need is ceil but with precision to the first decimal place.

Examples:

10.38 would be 10.4
10.31 would be 10.4
10.4 would be 10.4

So if it is any amount past a full tenth, it should be rounded up.

I’m running Ruby 1.8.7.

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Editorial Team · Answer 1 · 2026-05-25T06:08:57+00:00

Editorial Team

This works in general:

ceil(number*10)/10

So in Ruby it should be like:

(number*10).ceil/10.0

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