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Placing the "&"

  • To: mathgroup at smc.vnet.net
  • Subject: [mg114759] Placing the "&"
  • From: ziloo <ziloo_1 at yahoo.com>
  • Date: Thu, 16 Dec 2010 05:48:13 -0500 (EST)

Hello folks...a newbie question here,

Looking at the following three examples, would you please
explain the criteria for placing the "&" when using an
anonymous function:

2^(#) +1 &

Select[Range[1000],PrimeQ[2^(#)+1]&]

Select[Range[500], PrimeQ[FromDigits[Table[1, {#}]]] &]

Why is the "&" getting further away from the function's body?


Thank you

ziloo


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