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12-10-2007

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Quote:

Originally Posted by ahjiefreak

Where the 'constant' (h) gets assigned it's value?
The h is actually counting the number of folders from other variables.

No, it's not. h is doing nothing. You never assign it a value. awk will initialize it to zero for you. So that is the only value it ever has.

Quote:

Originally Posted by ahjiefreak

Did I missed out any "$" in the below fragment of code?

Miss out?? You have too many!

Code:

$ awk -v h=64  'BEGIN { print sqrt(h); }' /dev/null
8
$ awk -v h=64  'BEGIN { print sqrt($h); }' /dev/null
0
$

In the code:
t= h*($3+$2);
s= sqrt($t)

t will be zero since you guaranteed that h is zero.
s=sqrt(t)
would have taken the square root of that zero and yielded zero, a legal operation.
s=sqrt($t)
is going to try the square root of $0, the whole record in awk.

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