dsalgo 0.3.10

A package for Datastructures and Algorithms.
Documentation 
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use crate::digits_sum::digits_sum;

pub fn is_multiple_of_9(n: u64) -> bool {
    digits_sum(n) % 9 == 0
}

#[cfg(test)]

mod tests {

    use super::*;

    #[test]

    fn test() {
        assert!(is_multiple_of_9(123456789));
    }
}