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Topic: Questions on the finer points.
Replies: 1   Last Post: Jul 28, 1996 11:18 PM

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Hein Hundal

Posts: 3
Registered: 12/7/04
Questions on the finer points.
Posted: Jul 24, 1996 7:14 PM
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There are some things in Mathematica that seem to be the same, but I
suspect that they are some different. Could someone enlighten me about
the difference between the following:

1) What is the difference (if any) between f and g? Are there any
circumstances where f will work, but g won't. Is g always faster than
f? Does anyone prefer one definition to the other for another reason?

1a)

f[x_] := x^2
g = #^2 &

1b)
f[x_] := 1 /; x > 0
f[x_] := 0 /; x <= 0
g[x_] := If[ x>0, 1, 0]


2) Hold and HoldForm

3) Block and Module







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