LESSON 182 OF 414 · PROJECTS: EVERYDAY PROGRAMS

Report Card V6 - Class Statistics in Rust

Practice

Compute three class statistics from a list of scores: the highest, the lowest, and the average.

You start with:

// Rust: the editor starts empty - declare the data yourself, for example:
let mut scores = vec![92, 78, 85, 67, 74, 88, 91, 58];

Build:

Highest: 92
Lowest: 58
Average: 79

Rules:

highest is the largest value in scores.
lowest is the smallest value in scores.
average is the sum of all scores divided by how many there are, rounded down (integer division).
Print "Highest: ", "Lowest: " and "Average: " on three lines, in the order of the sample output (println!("Highest: {}", highest);).

Use .iter().max() and .iter().min() which return Option; .iter().sum() for the total.

let mut scores = vec![92, 78, 85, 67, 74, 88, 91, 58];
let mut highest = scores.iter().max().unwrap();
let mut lowest = scores.iter().min().unwrap();
let mut total = 0;
for s in &scores {
    total += s;
}
let mut average = total / scores.len();
println!("Highest: {}", highest);
println!("Lowest: {}", lowest);
println!("Average: {}", average);

STEP 1 OF 10

Guided

Ctrl + Enter to check

Report Card V6 - Class Statistics in Rust

Report Card V6 in Rust