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README.md |
README.md
prev_prime
Instructions
Create a function which returns the first prime number which is less than or equal to the u64
passed as an argument.
If there are no smaller primes, the function should return 0
.
Expected function
pub fn prev_prime(nbr: u64) -> u64 {
}
Usage
Here is a possible program to test your function :
fn main() {
println!("The previous prime number before 34 is: {}", prev_prime(34));
}
And its output :
$ cargo run
The previous prime number before 34 is: 31
$