Java .ceil()

The Math.ceil() method returns the double value that is a mathematical integer and is greater than or equal to the original value.

Syntax

Math.ceil(num)

• The result is the same as the argument if the argument value is already equal to a mathematical integer.
• The result is identical to the argument if the argument is NaN, +/- infinity, or +/- zero.
• The parameter num is of type double.
• The result is of type double

Example 1

The following example demonstrates using .ceil():

// Example.java
public class Example {
  public static void main(String args[]) {
    Double value1 = 8.3;
    Double value2 = 8.9;

    System.out.println(Math.ceil(value1));
    System.out.println(Math.ceil(value2));
  }
}

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This results in the following output:

9.0
9.0

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Example 2

The following example demonstrates using .ceil() with negative numbers:

// Example.java
public class Example {
  public static void main(String args[]) {
    Double value1 = -0.5;
    Double value2 = -1.3;

    System.out.println(Math.ceil(value1));
    System.out.println(Math.ceil(value2));
  }
}

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This results in the following output:

-0.0
-1.0

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