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Java ceil() method with Examples

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The java.lang.Math.ceil() returns the double value that is greater than or equal to the argument and is equal to the nearest mathematical integer. 

Note:

  • If the argument is Integer, then the result is Integer.
  • 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.

Syntax: 

public static double ceil(double a) 
a : the argument whose ceil value is to be determined 

Returns : This method returns the double value that is greater than or equal to the argument and is equal to the nearest mathematical integer.

Example 01:To show working of java.lang.Math.ceil() method. 

java




// Java program to demonstrate working
// of java.lang.Math.ceil() method
import java.lang.Math;
 
class Gfg {
 
    // driver code
    public static void main(String args[])
    {
        double a = 4.3;
        double b = 1.0 / 0;
        double c = 0.0;
        double d = -0.0;
        double e = -0.12;
 
        System.out.println(Math.ceil(a));
 
        // Input Infinity, Output Infinity
        System.out.println(Math.ceil(b));
 
        // Input Positive Zero, Output Positive Zero
        System.out.println(Math.ceil(c));
 
        // Input Negative Zero, Output Negative Zero
        System.out.println(Math.ceil(d));
 
        // Input  less than zero but greater than -1.0
        // Output Negative zero
        System.out.println(Math.ceil(e));
    }
}


Output:

5.0
Infinity
0.0
-0.0
-0.0

Example 02: To show the working of ceil() with a positive double value

Java




import java.io.*;
 
class GFG {
    public static void main (String[] args) {
        double number = 3.5;
        double result = Math.ceil(number);
        System.out.println(result);  // Output: 4.0
 
    }
}


Output :

4.0


Last Updated : 04 Apr, 2023
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