2 releases
0.1.1 | Apr 13, 2023 |
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0.1.0 | Dec 17, 2022 |
#1579 in Math
11KB
88 lines
Hyperoperation
This crate allows to calculate and format hyperoperation, sometimes known as Knuth's up-arrow notation, which is a way to define very large numbers, such as famous 3↑↑↑3.
Features
- Calculate value of hyperoperations (docs)
- Format hyperoperations with Knuth's up-arrow notation (docs)
- Use any unsigned numeric type for calculation fitting some conditions, such as BigUint
Examples
Simple calculation:
use hyperoperation::*;
assert_eq!(
hyperoperation::<u64>(&3, 3, 2), // 3 ↑↑ 3
7625597484987
);
Using BigUint to handle big results without overflowing (don't forget to add num_bigint
as your dependency) :
use hyperoperation::*;
use num_bigint::BigUint;
let result = hyperoperation::<BigUint>(&5u8.into(), 3u8.into(), 2); // 5 ↑↑ 3
println!("Result:\n{result}");
assert_eq!(
result % BigUint::from(100_000_000u32),
8203125u32.into()
);
Using Hyperoperation structand formatting it with Knuth's up-arrow notation:
use hyperoperation::*;
let expr = Hyperoperation::<u64>::new(3, 3, 2); // Represents 3 ↑↑ 3
let result = expr.clone().evaluate(); // Calculate the value of 3 ↑↑ 3
println!("{expr} = {result}");
assert_eq!(result, 7625597484987);
assert_eq!(format!("{expr}"), "3 ↑↑ 3");
Dependencies
~230KB