Prime Numbers in a Grid素数网格
&/@ Shorthand notation for Map
If[PrimeQ[#], Framed@Style[#, Orange, Bold, 15], #] & /@ Range[250]
Grid@Partition[If[PrimeQ[#],
Tooltip[Framed@Style[#, Orange, Bold, 15], "Prime!"], #] & /@Range[250],
10]
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