How do I add two numbers using awk? How do I calculate all incoming number stream on fly and display the total using awk?
AWK is a programming language designed for processing text-based data, either in files or data streams. Calculating incoming stream is not a big deal with awk. You can add two numbers as follows:
# add 2 + 5 echo |awk '{ print 2+3 }' # add incoming 10 + 10 echo 10 | awk '{ print $1 + 10}'
Create a text file called numbers as follows /tmp/numbers:
10 20 30
To add numbers, enter:
awk '{total += $1}END{ print total}' /tmp/numbers
Sample outputs:
60
Use the ps command output (stream) to calculate total size of php-cgi process using awk, enter:
ps -aylC php-cgi | grep php-cgi | awk '{total += $8}END{size= total / 1024; printf "php-cgi total size %.2f MB\n", size}'
Sample outputs:
php-cgi total size 2004.21 MB
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