CODEWITHSUNDEEP
rust
turtle
turtle

Reputation: 8093

How to error handle string to float conversion

This is a very simple question but I can't seem to solve it. I have a string that I'd like to convert to a float. I want to catch any error in this conversion as well.

let str = "10.0"
let f: f32 = str.parse().unwrap();

How can I catch errors of the string is "" or dog. I was trying to use a match expression with Some and None, but I'm not sure that correct as I couldn't get it to work.

Upvotes: 2

Views: 2007

Answers (1)

Aplet123
Aplet123

Reputation: 35560

parse returns a Result, not an Option, so you should use Ok and Err instead of Some and None:

let str = "10.0";
let f: f32 = match str.parse() {
    Ok(v) => v,
    Err(_) => 0.0 // or whatever error handling
};

Upvotes: 5

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