【Java】保留小数点后几位

import java.text.DecimalFormat;
import java.util.Scanner;

public class ACM_1005 {

    public static void main(String[] args) {

        Scanner scan = new Scanner(System.in);
        int F = scan.nextInt();

        float c = (float) 5 * (F - 32) / 9;

        

        System.out.println(String.format("c=%.2f", c));

    }

}