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Java round() Method: Usage and Examples
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Table of Content:
Description
This java tutorial shows how to use the round(float a) method of Math class under java.lang package. This method returns the absolute value of the double method argument.
The method round returns the closest long or int, as given by the methods return type.
Syntax
This method has the following variants ?
long round(double d) int round(float f)
Parameters
Here is the detail of parameters ?
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d ? A double or float primitive data type.
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f ? A float primitive data type.
Return Value
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This method returns the closest long or int, as indicated by the method's return type, to the argument.
Example
public class MathRoundMethod { public static void main(String args[]) { double d = 120.675; double e = 130.500; float f = 120; float g = 91f; System.out.println(Math.round(d)); System.out.println(Math.round(e)); System.out.println(Math.round(f)); System.out.println(Math.round(g)); } }
Output
121 131 120 91 Press any key to continue . . .
Example
public class RounFloatDoubleNumbersExample { public static void main(String[] args) { System.out.println(Math.round(10f)); System.out.println(Math.round(20.5f)); System.out.println(Math.round(20.5f)); System.out.println(Math.round(-19.4f)); System.out.println(Math.round(-23.5f)); } }
Output
10 21 21 -19 -23 Press any key to continue . . .