The **`ceil()` function** returns the nearest smallest double value that is greater than or equal to a number.

Figure 1 shows the mathematical representation of the `ceil()` function.

# Syntax
```java
double ceil(number num)
```
# Parameter
This function requires a number as a parameter.
> The number can be `int`, `float`, `double`, or `long`.

# Return Value
`ceil()` returns the nearest, smallest double value that is greater than or equal to a number sent as a parameter.

# Example


class JAVA {
    public static void main( String args[] ) {
        //integer
        System.out.println("Math.ceil(2):");
        System.out.println(Math.ceil(2));

        //positive double value
        System.out.println("Math.ceil(2.56):");
        System.out.println(Math.ceil(2.56));

        //negative double value
        System.out.println("Math.ceil(-2.36):");
        System.out.println(Math.ceil(-2.36));
    }
}

What is Math.ceil() in Java?

Rounding up, the ceil() function returns the smallest double value greater than or equal to the given number.