github.com/benhoyt/goawk@v1.8.1/testdata/t.incr2 (about)

     1  { s = 0
     2    for (i=1; i <= NF; )
     3  	if ($(i) ~ /^[0-9]+$/)
     4  		s += $(i++)
     5  	else
     6  		i++
     7    print s
     8  }