For loops are a way of the past. Get with the times and become functional. It's in the name - functional - it simply just functions. It's just as easy to get started as numpy/python, it's just as powerful, and it's way faster! (ok, numpy is just as fast, but if numpy=F#, and F# is faster than python, well... I'll let the math speak for itself).
Check out an example project of mine, an MCMC simulation for the 2D Ising model: github.com/SaltyCatAgenda/Ising-Model
F# is a mature and robust language that gives performance close to low level languages while offering a wide variety of powerful features. Use it for math, data science, simulations, or more conventional use cases such as full stack ...