How to use the isInfinite() method of the Double class to determine whether a number is infinitesimal

How to use the isInfinite() method of the Double class to determine whether a number is infinitesimal

Infinite small is a concept in mathematics, used to indicate that a number is close to zero but not equal to zero. In computer programming, we often need to determine whether a number is infinitesimal. Java's Double class provides the isInfinite() method to determine whether a number is infinitesimal. This article will introduce how to use the isInfinite() method of the Double class to determine whether a number is infinitesimal, and give a code example.

The code example is as follows:

public class Main {
    public static void main(String[] args) {
        double number1 = 0.0;
        double number2 = 1.0 / 0.0;
        double number3 = -1.0 / 0.0;
      
        System.out.println(number1 + " is infinite: " + Double.isInfinite(number1));
        System.out.println(number2 + " is infinite: " + Double.isInfinite(number2));
        System.out.println(number3 + " is infinite: " + Double.isInfinite(number3));
    }
}

Code analysis:

In the code example, we define three double type variables number1, number2 and number3, and use isInfinite( ) method to determine whether they are infinitesimal.

First, we defined the number1 variable as 0.0. Since 0.0 is not infinitesimal, the output result is "0.0 is infinite: false".

Next, we defined the number2 variable as 1.0 / 0.0, which is positive infinity. Since positive infinity is a special case of infinitesimal, the output result is "Infinity is infinite: true". Positive infinity is represented as Infinity.

Finally, we defined the number3 variable as -1.0 / 0.0, which is negative infinity. Similar to positive infinity, negative infinity is also a special case of infinitesimal, so the output result is "-Infinity is infinite: true". Negative infinity is represented as -Infinity.

Through this example, we can see that the isInfinite() method of the Double class can determine whether a number is infinitesimal. This method returns true if a number is infinitesimal; otherwise it returns false.

Summary:

This article introduces how to use the isInfinite() method of the Double class to determine whether a number is infinitesimal, and gives a code example. In actual programming, when we need to determine whether a number is infinitesimal, we can use the isInfinite() method of the Double class to complete this task. This method is useful for applications that deal with floating point numbers.

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