mirror of
https://github.com/notohh/rustlings.git
synced 2024-11-24 14:37:32 -05:00
22 lines
447 B
Rust
22 lines
447 B
Rust
// Calculates the power of 2 using a bit shift.
|
|
// `1 << n` is equivalent to "2 to the power of n".
|
|
fn power_of_2(n: u8) -> u64 {
|
|
1 << n
|
|
}
|
|
|
|
fn main() {
|
|
// You can optionally experiment here.
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use super::*;
|
|
|
|
#[test]
|
|
fn you_can_assert_eq() {
|
|
assert_eq!(power_of_2(0), 1);
|
|
assert_eq!(power_of_2(1), 2);
|
|
assert_eq!(power_of_2(2), 4);
|
|
assert_eq!(power_of_2(3), 8);
|
|
}
|
|
}
|