awk weird problem.

Shell Programming and Scripting
1 
awk 'BEGIN{print 1.2.3.4}'

1.20.30.4

Can anyone explain why has extra "0" in the IP address?

2

Because it's printing the concatenation of 3 floating point numbers: 1.2, 0.3, and 0.4. If you want to print the ip address, quote it so that it's parsed as a string.

Regards,
Alister

3

but why awk think that's 3 floating numbers, not a string? Is the bug in it?

4 
$ awk 'BEGIN{print "1.2.3.4"}'
1.2.3.4