Fortran IV on a Honeywell 2020 with a whopping 32 K of “core” memory.
That was back in 1975, and was my first programming language.
And I agree, there nothing wrong with Fortran.
I learned assembler first, then fortran.
I used fortran to simulate Marilyn Vos Savant’s problem of the “3 doors, two goats and a prize”. What confounded people is that people don’t understand odds and statistics. The program I wrote randomly chose assignment of the goats and the prize, randomly decided for the contestant which of the doors should be chosen, randomly decided which of the two goat doors would be revealed by the host, and randomly decided whether the contestant stayed or switched to the other remaining door after the host did the reveal of one goat.
It looks 50-50 at first....but when it ran for 600 million iterations, the stats did not lie: switching doors would give a 66.6% chance of winning.
Loved fortran.