Completely useless.
Well to be fair...
I studied after I already worked as a software dev for a few years, so I already knew most of the stuff.
Most of the time I just pointed out mistakes of the profs.
I still completed it, but I've never used the degree at all. Not even for my recent interview. I did not even put it on my CV. And I still landed the job.

I think that practical experience is way more valuable than having a CS degree. (Apart from CS research/academic positions)

"I already knew most of the stuff" sorry but I don't buy that. How the heck you did floating point calculation at work before CS studies?

There's bunch of theoretical studies during CS that help you understand how things work under the hood, but you will NEVER use them in work life.

@wateringdisease it would be accurate tho had he said i already knew how to code. Anyway CS makes me feel dumb coz after graduating i still feel i dont know shit. And i cant count all the theoretical things that the degree didnt teach me.

@AymanH my degree didn't tech me shit so I barely know what a floating point number is.

@wateringdisease I had not only math in four semesters, but even a course on numerics. I have yet to see a self-taught person who could recognise a badly conditioned problem and come up with something like singular value decomposition. Sounds like pure theory?

Well the mech guys had a helicopter rotor with measuring stripes to measure movement and then calculate what the forces must have been so that the construction could be optimised.

The computer said something like a force equivalent to the weight force of half a kg from the right, 1 kg from the left, and so on, and to several metric tons shearing force at the tips. Impossible, that would have blown the rotor wing.

Well yeah but it was a stiff system, and going from force to movement is numerically well conditioned, but the other way around badly conditioned.

@Fast-Nop reminds me of the time we ran into numerical algorithm issues when working with sensors and stuff in college robotics. I ended up getting a book on basic numerical algorithms to actually understand what was going wrong, because none of us actually suspected it for the longest time. Lesson learnt the hard way, wish I had a course on numerics.