Question

How to round a number down to the nearest 10 in Java

Answer 1

public class MyClass {
    static int roundDownToNearest10(double num) {
        return  (int)Math.floor(num / 10) * 10;
    }

    public static void main(String args[]) {
        System.out.println(roundDownToNearest10(33));
        System.out.println(roundDownToNearest10(59));
        System.out.println(roundDownToNearest10(599.99));
        System.out.println(roundDownToNearest10(3.14));
        System.out.println(roundDownToNearest10(2));
        System.out.println(roundDownToNearest10(19));
        System.out.println(roundDownToNearest10(-12));
        System.out.println(roundDownToNearest10(-101));
        System.out.println(roundDownToNearest10(-109));
    }
}




/*
run:
 
30
50
590
0
0
10
-20
-110
-110
 
*/

 

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