take the arctangent of a number in rust

To take the arctangent of a number in Rust, you can use the atan function provided by the std::f64 module. This function takes a single argument of type f64 and returns the arctangent of that number in radians.

Here's an example code snippet that demonstrates the use of the atan function:

main.rs
fn main() {
    let x = 1.0;
    let arctan_x = x.atan();
    println!("arctan({}) = {}", x, arctan_x);
}
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In this example, we initialize a variable x with the value 1.0 and use the atan function to compute its arctangent. We then print the result using println! macro.

When you run this code, the output will be:

main.rs
arctan(1) = 0.7853981633974483
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Note that the output is in radians. If you want to convert it to degrees, you can use the to_degrees function provided by the std::f64 module as follows:

main.rs
    let arctan_x_deg = arctan_x.to_degrees();
    println!("arctan({}) = {} degrees", x, arctan_x_deg);
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This will output:

main.rs
arctan(1) = 45 degrees
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