Rust: What is the difference between find and find_map?

1let v = vec![1, 2, 3, 4, 5];
2
3// find: Some(4)
4let found = v.iter().find(|&&x| x > 3);
5
6// find_map: Some("four")
7let mapped = v.iter().find_map(|&x| {
8    if x > 3 {
9        Some(format!("{} is large", x))
10    } else {
11        None
12    }
13});