AWK processes every line of your file, but what if you want to iterate over the fields of each line itself?
You can iterate over fields using a while loop when using AWK.
Assume we have the following file:
321 524 124 174 185 254 195 273 345
Now let's iterate over the fields using a while loop.
$ awk '{
total = 0
i = 1
while (i < 4)
{
total += $i
i++
}
mean = total / 3
print "Mean value:",mean
}' myfile
The while loop iterates over the fields; we get the mean value for every row and print it.