github.com/benhoyt/goawk@v1.8.1/testdata/p.42 (about)

     1  /Asia/		{ pop["Asia"] += $3 }
     2  /Africa/	{ pop["Africa"] += $3 }
     3  END		{ print "Asian population in millions is", pop["Asia"]
     4  		  print "African population in millions is", pop["Africa"] }