>. y (Ceiling)
The monadic form of >. gives the ceiling of its right argument (y) , that is, the smallest integer greater than or equal to y.
For example:
>. 4.6 5 >. 4.2 4.5 4.6 5 5 5 >. 4.6 4 _4 _4.6 5 4 _4 _4
Common uses
Ceiling (and Floor (<.)) can also be useful for testing whether values are integers or not.
3 3.14 5 = >. 3 3.14 5 1 0 1
Ceiling (and Floor (<.)) can be useful for forcing floating point representations of integers to be integers in order to save memory (8 vs 4 bytes per value). Values like this can arise as a result of operations like Divide (%). For example:
27 % 9 3 datatype 27 % 9 floating >. 27 % 9 NB. or: 27 >.@:% 9 3 datatype >. 27 % 9 integer
See Also
Entry in the J Dictionary for >.
x >. y (Larger of (Max))
The dyadic form of >. gives the larger of its left (x) and right (y) arguments.
For example:
3 >. 4 4 3 >. 4 _4 4 3 2 3 >. 4 1 4 3
Common uses
>. can be used in conjunction with Insert (/) to find the maximum value in a list.
>./ 7 8 5 9 2 NB. maximum value in a list
9
>./\ 7 8 5 9 2 NB. running maximum
7 8 8 9 9