Question

How to calculate the average length of the strings in string array with Rust

Answer 1

fn main() {
    let arr = ["c#", "c", "rust", "java", "python"];
    
    let total_length: usize = arr.iter().map(|s| s.len()).sum();
    
    let average = total_length as f64 / arr.len() as f64;

    println!("{}", average);
}

  

  
/*
run:
  
3.4
  
*/

 

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Answer 2

fn main() {
    let arr = vec!["c#", "c", "rust", "java", "python"];
    
    let joined: String = arr.join("");
    
    let avg = joined.len() as f64 / arr.len() as f64;
    
    println!("{}", avg);
}


  
/*
run:
  
3.4
  
*/

 

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