What are the standard means for rounding numbers in Java?
- Example of rounding: 3.49 – 3, 3.50 – 4, 3.51 – 4.
Answer 1, Authority 100%
math.ceil (n)– returns the smallest integer that is greater or equal
argument n.math.floor (n)– returns the greatest integer
which is less than or equal to the argument n.math.round (N)returns
An integer nearest to argument N (round n).
Example with Ceil :
int rexult = (int) math.ceil (3.8);
System.out.PrintLN (Result); //4
INT RESULT = (INT) Math.ceil (3.3);
System.out.PrintLN (Result); //4
Example with Floor :
int rexult = (int) math.floor (3.8);
System.out.PrintLN (Result); // 3.
INT RESULT = (INT) Math.floor (3.3);
System.out.PrintLN (Result); // 3.
Example with Round :
int frame = (int) math.round (3.8);
System.out.PrintLN (Result); //4
INT RESULT = (INT) Math.round (3.3);
System.out.PrintLN (Result); // 3.
Answer 2, Authority 16%
During my youth, when there were no such smart ROUND / CEIL / FLOOR , rounding was done about this:
double x = 8.3;
int i;
i = (int) (x + 0.5); // Round
i = (int) (x); // Floor
i = (int) (x + 1); // Ceil.
Answer 3, Authority 3%
math.round () method Returns Long or int (integer), nearest to real number, double or Float , argument. In other words, it carries out rounding to integers.
double d1 = 1.49;
Double d2 = 1.50;
Math.round (D1);
Math.round (D2);
and result:
d1 = 1
d2 = 2.
Answer 4
Here is the right code:
double b = 6.7;
Float C = 4.5F;
Double H = 4.1;
System.Out.printLN (Math.round (H)); // Output to the screen The integer value of type int to the farmost number (4.5 will have a number 5)
System.Out.PrintLN (Math.Floor (C)); / * rounds the number of type float down to the nearest to Double * /
System.out.print (Math.ceil (H)); // Rounds the number of type Double up to the type Double