Math functions confusion

I need to implement square and square-root math functions in my program

what is the latest syntax for using them? as on a question in stack overflow, I saw one method but it was marked outdated

Check out the official docs:

Both the f64 and f32 types have those functions.

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Which SO question was it? Those can be fixed.

i have to square them as well

If you read through the f32 documentation you’ll find functions for that too. Square means raising to the power of 2 so you’d use .powi(2). For example:

let num: f32 = 4.0;
let squared = num.powi(2);
println!("{} squared is {}", num, squared);

let square_root = squared.sqrt();
println!("The square root of {} is {}", squared, square_root);