what is the nim equivalent to the python None type

okay. thanks i will look into that

what is the nim equivalent to the python None type

Your code does not compile. Also, i see no reason to actually have a "isNone" check. Nim is not Python, so the parameters for `initPoint` and `+` CANNOT be nil. So no need to actually try to check.

what is the nim equivalent to the python None type

`type Point* = object x,y,a,b: int func initPoint(x,y,a,b:int):Point = result.x = x result.y = y result.a = a result.b = b if some(x).isNone and some(y).isNone: return if not(y^2 == x ^ 3 + a*x+b): raise newException(ValueError, fmt"({x}, {y}) is not on the curve")` Run

what is the nim equivalent to the python None type

`import std/[strformat, options] import math type TypeError = object of ValueError type Point* = object x,y,a,b: int func initPoint(x,y,a,b:int):Point = result.x = x result.y = y result.a = a result.b = b if some(x).isNone and some(y).isNone: return if not(y^2 == x ^ 3 + a*x+b): raise newExcept

what is the nim equivalent to the python None type

`type Point* = object x,y,a,b: int func initPoint(x,y,a,b:int):Point = result.x = x result.y = y result.a = a result.b = b if some(x).isNone and some(y).isNone: return if not(y^2 == x ^ 3 + a*x+b): raise newException(ValueError, fmt"({x}, {y}) is not on the curve") ` Run

what is the nim equivalent to the python None type

> In most cases, you should use Option if you need something that could be > none, and avoid nil, even on reference types. I beg to differ. It allows for the state `Some(nil)` which you cannot easily prevent at compile time.

what is the nim equivalent to the python None type

thanks a lot for the explanation.I am actually trying to translate the jimmy song programming bitcoin book from python to nim in order to actually learn nim. I am trying to implement the Point field with infinity.

what is the nim equivalent to the python None type

What are you wanting to represent with it? If you're just trying to represent whether something is present or not, the `Option` type will do well. It's also typesafe, and won't crash the program if you try to use it as a normal value. On the other hand, you can use `nil` for ref types, which is

what is the nim equivalent to the python None type

Strictly speaking python's "None" is basically equivalent to "null" in Java is equivalent to "undefined"/"null" in JS. That one is equivalent to nim's "nil". That type you will **only** get if you deal with ref-types, aka when you declare your type like so: type A = ref object

what is the nim equivalent to the python None type

it seems it will solve the problem.thanks alot.

what is the nim equivalent to the python None type

Kinda but not really.

what is the nim equivalent to the python None type

I am translating a python code to nim and i need to find out the nim equivalent of None