Question

How to round a number to the next power of 2 in Rust

Answer 1

fn round_to_next_power_of_2(n: u32) -> u32 {
    if n == 0 {
        1
    } else {
        2u32.pow((n as f64).log2().ceil() as u32)
    }
}

fn main() {
    let num = 21;
    println!("Next power of 2: {}", round_to_next_power_of_2(num));
}



/*
run:

Next power of 2: 32

*/

 

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