如何只选择最大值？

a = 10
b = 20
c = 15

max_value = a
if b > max_value:
    max_value = b
if c > max_value:
    max_value = c

print(max_value)

var a = 10;
var b = 20;
var c = 15;

var max_value = Math.max(a, b, c);

console.log(max_value);

import java.util.Arrays;
import java.util.Collections;
import java.util.List;

public class Main {
    public static void main(String[] args) {
        Integer[] values = {10, 20, 15};
        List<Integer> list = Arrays.asList(values);

        Integer max_value = Collections.max(list);

        System.out.println(max_value);
    }
}