Java Math ceil()

The Java Math ceil() method rounds the specified double value upward and returns it.

The rounded value will be equal to the mathematical integer. That is, the value 3.4 will be rounded to 4.0 which is equal to integer 4.

The syntax of the ceil() method is:

Math.ceil(double value)

Here, ceil() is a static method. Hence, we are accessing the method using the class name, Math.


ceil() Parameters

The ceil() method takes a single parameter.

  • value - number which is to be rounded upward

ceil() Return Value

  • returns the rounded value that is equal to the mathematical integer

Note: The returned value will be the smallest value that is greater than or equal to the specified argument.


Example: Java Math.ceil()

class Main {
  public static void main(String[] args) {

    // Math.ceil() method
    // value greater than 5 after decimal
    double a = 1.878;
    System.out.println(Math.ceil(a));  // 2.0

    // value equals to 5 after decimal
    double b = 1.5;
    System.out.println(Math.ceil(b));  // 2.0

    // value less than 5 after decimal
    double c = 1.34;
    System.out.println(Math.ceil(c));  // 2.0
  }
}

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