round a number to the nearest hundredth in rust

In Rust, you can use the round() method from the f32 or f64 floating-point types to round a number to the nearest integer. However, to round a number to the nearest hundredth, you need to perform some additional math. One way to do it is to multiply the number by 100, round it to the nearest integer, and then divide the result by 100. Here's an example implementation:

main.rs
fn round_to_nearest_hundredth(num: f32) -> f32 {
    (num * 100.0).round() / 100.0
}
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This function takes a floating-point number as input and returns another floating-point number that represents the input number rounded to the nearest hundredth. Here's an example usage:

main.rs
fn main() {
    let num = 3.141592;
    let rounded_num = round_to_nearest_hundredth(num);
    println!("{} rounded to nearest hundredth is {}", num, rounded_num);
}
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Output: 3.141592 rounded to nearest hundredth is 3.14.