# 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
```

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