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Java Math Class static double ceil(double d) with example

Java Math Class double ceil(double d) method: Here, we are going to learn about the double ceil(double d) method of Math Class with its syntax and example.
Submitted by Preeti Jain, on September 01, 2019

Math Class double ceil(double d)

• This method is available in java.lang package.
• This method is used to return the least or smallest value of the double type value which is greater than or equal to the given parameter.
• This is a static method so it is accessible with the class name too.
• The return type of this method is double that means it returns the smallest value of the given parameter [double type].
• In this method, we pass only one parameter as an argument.
• This method does not throw any exception.

Syntax:

    public static double ceil(double d){
    }

Parameter(s):

double d – A double value whose least or smallest value to be found.

Note:

• If we pass "NaN", it returns "NaN".
• If we pass zero, it returns the same.
• If we pass an infinity (positive or negative), it returns the infinity with the same sign.
• If we pass an argument whose value is less than 0 but greater than -1.0, it returns -0.0.
• If we pass an argument whose value after the decimal point is greater than 0, it returns the incremented value by 1.

Return value:

The return type of this method is double, it returns the least or smallest value of the double type value which is greater than or equal to the given parameter.

Java program to demonstrate example of ceil(double d) method

// Java program to demonstrate the example of 
// ceil(double d) method of Math Class

class CeilMethod {
    public static void main(String[] args) {
        // Here we are declaring few variables
        double d1 = -0.0;
        double d2 = 0.0;
        double d3 = -7.0 / 0.0;
        double d4 = 7.0 / 0.0;
        double d5 = -0.6;
        double d6 = 1000.0;
        double d7 = 1000.4;

        // Display previous value of d1,d2,d3,d4,d5 ,d6 and d7
        System.out.println("Old value of d1 before implementation is: " + d1);
        System.out.println("Old value of d2 before implementation is :" + d2);
        System.out.println("Old value of d3 before implementation is :" + d3);
        System.out.println("Old value of d4 before implementation is :" + d4);
        System.out.println("Old value of d5 before implementation is :" + d5);
        System.out.println("Old value of d6 before implementation is :" + d6);
        System.out.println("Old value of d7 before implementation is :" + d7);

        // Here , we will get (-0.0) because we are passing parameter 
        // (-0.6)  because passed value is less than 0 but greater than -1.0
        System.out.println("New value of d1 after implementation is :" + Math.ceil(d1));

        // Here , we will get (0.0) because we are passing parameter (0.0)
        System.out.println("New value of d2 after implementation is :" + Math.ceil(d2));

        // Here , we will get (-Infinity) because we are passing 
        // parameter (-7.0/0.0)
        System.out.println("New value of d3 after implementation is :" + Math.ceil(d3));

        // Here , we will get (Infinity) because we are passing 
        // parameter (7.0/0.0)
        System.out.println("New value of d4 after implementation is :" + Math.ceil(d4));

        // Here , we will get (-0.0) because we are passing 
        // parameter (-0.6)  because passed value is less than 
        // 0 but greater than -1.0
        System.out.println("New value of d5 after implementation is :" + Math.ceil(d5));

        // Here , we will get (1000.0) because we are passing 
        // parameter (1000.0)  because passed value after decimal point 
        // is not greater than 0 so the same number is returned
        System.out.println("New value of d6 after implementation is :" + Math.ceil(d6));

        // Here , we will get (1001.0) because we are passing 
        // parameter (1000.4)  because passed value after decimal 
        // point is greater than 0 so the number is incremented by 1 is returned
        System.out.println("New value of d7 after implementation is :" + Math.ceil(d7));
    }
}

Output

E:\Programs>javac CeilMethod.java

E:\Programs>java CeilMethod
Old value of d1 before implementation is :-0.0
Old value of d2 before implementation is :0.0
Old value of d3 before implementation is :-Infinity
Old value of d4 before implementation is :Infinity
Old value of d5 before implementation is :-0.6
Old value of d6 before implementation is :1000.0
Old value of d7 before implementation is :1000.4

New value of d1 after implementation is :-0.0
New value of d2 after implementation is :0.0
New value of d3 after implementation is :-Infinity
New value of d4 after implementation is :Infinity
New value of d5 after implementation is :-0.0
New value of d6 after implementation is :1000.0
New value of d7 after implementation is :1001.0