Ceiling[x] gives the smallest integer greater than or equal to x. Ceiling[x, a] gives the smallest multiple of a greater than or equal to x.

Round up to the nearest integer: In[1]:=Ceiling[2.4] Out[1]=3 In[2]:=Ceiling[2.6] Out[2]=3 Round up to the nearest multiple of 10: In[1]:=Ceiling[226, 10] Out[1]=230 Plot the function over a subset of the reals: In[1]:=Plot[Ceiling[x], {x, -3, 3}] Out[1]=

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Listable | NumericFunction | Protected | ReadProtected

Floor | IntegerPart | FractionalPart | Round | Chop | BinCounts | Quantile | FindDivisions

395th most common (1 in 16600 symbols)

265th most common (1 in 6250 symbols)

478th most common (1 in 7310 symbols)

introduced in Version 1 (June 1988) last modified in Version 6 (May 2007)