How to round number up to a specific number of decimal places?

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Paulo Silva
Paulo Silva 2020-8-3
回答： Alan Stevens 2020-8-3
Suppose I have a variable x=0.34; is there a function (or how would one look like) to round this number up to, say 0.4 (next highest number with one decimal place)?
Just like ceil, but with decimals?

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Alan Stevens
Alan Stevens 2020-8-3
ceil(10*x)/10

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