[Tutor] How do I do square roots and exponents?

[Raymond Hettinger]

I like:

def hypot(a,b):
   return( a*a + b*b ) ** 0.5

or for numerical types who hate unnecessay truncation error and overflow:

def hypot(a,b):
   a, b = abs(a), abs(b)
   if a > b:  return a * (1.0+(b/a)**2)**0.5
   elif a == 0.0: return b
   else:  return b * (1.0+(aa/bb)**2)**0.5


Raymond


----- Original Message -----
From: "Ian!" <imcmeans@shaw.ca>
To: <tutor@python.org>
Sent: Thursday, March 28, 2002 1:25 AM
Subject: Re: [Tutor] How do I do square roots and exponents?


> Here's my attempt. I was wondering if there was a more elegant way of
doing
> it?
>
> >>> def f(alist):
>  sum = 0
>  for elem in alist:
>   sum += elem**2
>  return sum**0.5
>
> >>> f([3,4])
> 5.0
>
>
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