eng_fmt

This is a Rust crate that formats f64 as a String in engineering notation.

Change Log

• 0.1.2: Tweaked this readme and fixed a bad link.
• 0.1.1: Provided much better examples in documentation.

lib.rs:

Module containing trait to format f64 in engineering notation.

Examples

use eng_fmt::FormatEng;
let x: f64 = 0.010;
let expected = "10.0e-3".to_string();
assert_eq!(x.format_eng(None), expected);

use eng_fmt::FormatEng;
let x = std::f64::consts::PI;
let expected = "3.142".to_string();
assert_eq!(x.format_eng(Some(4)), expected);

use eng_fmt::FormatEng;
let x = 6.022e-23;
let expected = "60.2e-24".to_string();
assert_eq!(x.format_eng(None), expected);