Question

How to check if a number has zero in the center in Rust

Answer 1

fn has_zero_in_center(number: i64) -> bool {
    let num_str = number.to_string();
    
    if num_str.len() % 2 == 0 {
        return false; // Even length = no center digit
    }
    
    let center_index = num_str.len() / 2;
    
    num_str.chars().nth(center_index) == Some('0')
}

fn main() {
    let number = 3720961;
    
    if has_zero_in_center(number) {
        println!("yes");
    } else {
        println!("no");
    }
}


  
/*
run:

yes

*/

 

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