Sqrt in Rust 1.55

In Rust 1.55, the sqrt() function is available in the standard library, which allows you to calculate the square root of a number.

Here's an example of how to use sqrt():

fn main() {
    let num: f64 = 16.0;
    let sqrt_num = num.sqrt();
    println!("The square root of {} is {}", num, sqrt_num);
}

In this example, num is a variable of type f64 that holds the number we want to calculate the square root of. The sqrt() function is called on the num variable, and the result is stored in the sqrt_num variable. Finally, the println!() macro is used to print the original number and its square root.

The output of this code will be:

The square root of 16 is 4

You can also use the sqrt() function with other numeric types such as u32, i64, etc. For example:

fn main() {
    let num: u32 = 36;
    let sqrt_num = (num as f64).sqrt();
    println!("The square root of {} is {}", num, sqrt_num);
}

In this example, num is a variable of type u32 that holds the number we want to calculate the square root of. However, since sqrt() only works with floating-point numbers, we need to convert num to a f64 using the as keyword. The result of sqrt() is stored in the sqrt_num variable and printed using the println!() macro.

The output of this example will be:

The square root of 36 is 6