Question

How to get the first and the last digit of a number in Rust

Answer 1

fn get_first_digit(mut number: i32) -> i32 {
    number = number.abs();
    
    while number >= 10 {
        number /= 10;
    }
    
    number
}

fn main() {
    let number = 87354;
    
    let first_digit = get_first_digit(number);
    println!("{}", first_digit);
    
    let last_digit = number % 10;
    println!("{}", last_digit);
}



      
/*
run:
  
8
4

*/
 

 

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