That's awk. That is literally the control flow style of awk, which Larry Wall copied into Perl very directly and entirely deliberately. I find it very interest

That's awk. That is literally the control flow style of awk, which Larry Wall copied into Perl very directly and entirely deliberately. I find it very interesting that RPG uses it, and I wonder if it's convergent evolution (relative to awk and RPG) or if one is copying the other.