Signum

Adds the signum function to Rust. The signum function or sign function will return 1 when a positive number is passed in, -1 when a negative number is passed in, or 0 when 0 is passed in.

Installation:

cargo add signum-sign

Usage:

use signum_sign::sgn;

fn main() {
    println!("{}, {}, {}", sgn(0), sgn(-2), sgn(2)); // Outputs "0, -1, 1"
}

Heron:

This branch also adds the Heron method of approximating the square root of a number. This method is more accurate than the Babylonian method, but is slower.

THIS IS WILDLY INNEFICIENT AND IS MORE OF A PROOF OF CONCEPT THAN ANYTHING ELSE.

Usage:

use signum_sign::heron;

fn main() {
    println!("{}", heron(2.0)); // Outputs "1.414213562373095"
}