I want to see just last sum here, but it shows me everything.

awk '{print sum += $1} END {print sum}' file.dat

This is the output:

1.2
3.6
7.3
7.3

3

1 Answer

Considering you want sums in file.dat added together and then print them out, the line should be:

awk '{sum +=$1} END {print sum}' file.dat

Telling awk to print the sum every time you add a new value to sum makes it show each intermediate value, just as you have experienced.

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