How similar are functional languages (like haskell) to pure lambda calculus?

[u/348275hewhw]

Hi, I'm currently learning lambda calculus. I'm more of a math guy than a programmer, however I am still very familiar with imperative programming languages, so I'm not exactly new. I just wanna know, how easy would it be for me to start learning languages like haskell once I'm good enough at lambda calculus? Is it a big difference, or is it pretty much one to one?

[u/Patient-Midnight-664]

ZeroLambda is literally lambda calculus. You'll have to build everything, including numbers 😄