Java Math ceil(double a) method example

Method Returns :

The ceil(double a) method simply returns the smallest (closest to negative infinity) floating-point value that is greater than or equal to the argument and is equal to a mathematical integer.. Consider the following cases:

• If the argument value is already equal to a mathematical integer, then the result is the same as the argument.
• If the argument is NaN or an infinity or positive zero or negative zero, then the result is the same as the argument.
• If the argument value is less than zero but greater than -1.0, then the result is negative zero.

Compatibility Version :

Requires Java 1.0 and up

Exception :

N/A

Java Code Example :

This java example source code demonstrates the use of ceil(double a) method of Math class. Basically we just get the ceiling value of the user input.

package com.javatutorialhq.java.examples;

import static java.lang.System.*;

import java.util.Scanner;

/*
 * This example source code demonstrates the use of 
 * ceil(double a) method of Math class
 * Get the ceiling value of the user input
 */

public class MathCeiling {

	public static void main(String[] args) {
		// ask for user input
		out.print("Enter a value:");
		Scanner scan = new Scanner(System.in);
		// use scanner to get user console input
		double value = scan.nextDouble();		
		// get the ceiling of a value
		double ceilValue = Math.ceil(value);
		out.println("ceiling of "+value+" = "+ceilValue);		
		// close the scanner object to avoid memory leak
		scan.close();

	}

}

Sample Output :

Running the ceil(double a) method example source code of Math class will give you the following output

Enter a value:12.35
ceiling of 12.35 = 13.0

Exception Scenario :

N/A

Similar Method :

• N/A

Suggested Reading List :

• Java Math Class Tutorial

References :

• Oracle Java 7 API