Homework & Coursework Questions

 
awk 'BEGIN {sum=0} {sum=sum+$5} END {print sum}' input_file

awk '
BEGIN {sum=0} ## In begining sum variable is set to 0
{sum=sum+$5}  ## Now adding $5 values each time with it's previous values so that we can get complete SUM of $5 in variable sum
END {print sum}' input_file  ## At last printing value of variable sum

awk '   # Run awk with the following script...
BEGIN {
               # variable sum is set with a value 0
               sum=0      
} 

# File reading starts from here, read line by line...

{

  # You can also use sum+=$5 it is just a shorthand/shortcut
  # What below expression does is that it first adds the value stored in variable sum to column5 value from your file,
  # and then stores the total of the two back to the variable sum

  sum=sum+$5   

} 


END{
       # After all lines have been read from all input files given to
       # this invocation of awk, run the commands in this section.

      # Finally print sum here
      print sum
}
 ' input_file  # End the script and specify the input file(s) to be processed by this

awk '{sum+=$5} END {print sum}' input_file