Dart num isInfinite
Syntax & Examples

num.isInfinite property

The `isInfinite` property in Dart returns true if the number is positive infinity or negative infinity; otherwise, it returns false.

Syntax of num.isInfinite

The syntax of num.isInfinite property is:

 bool isInfinite

This isInfinite property of num true if the number is positive infinity or negative infinity; otherwise, false.

Return Type

num.isInfinite returns value of type bool.


✐ Examples

1 Check positive infinity

In this example,

  1. We create a double variable infinity and assign it the value of positive infinity.
  2. We check if the number is infinite using the isInfinite property.
  3. We then print the result to standard output.

Dart Program

void main() {
  double infinity = double.infinity;
  bool isInfiniteValue = infinity.isInfinite;
  print('Is $infinity infinite? $isInfiniteValue');
}

Output

Is Infinity infinite? true

2 Check negative infinity

In this example,

  1. We create a double variable negativeInfinity and assign it the value of negative infinity.
  2. We check if the number is infinite using the isInfinite property.
  3. We then print the result to standard output.

Dart Program

void main() {
  double negativeInfinity = -double.infinity;
  bool isInfiniteValue = negativeInfinity.isInfinite;
  print('Is $negativeInfinity infinite? $isInfiniteValue');
}

Output

Is -Infinity infinite? true

3 Check finite number

In this example,

  1. We create a double variable finiteNum with the value 42.0, which is a finite number.
  2. We check if the number is infinite using the isInfinite property.
  3. We then print the result to standard output.

Dart Program

void main() {
  double finiteNum = 42.0;
  bool isInfiniteValue = finiteNum.isInfinite;
  print('Is $finiteNum infinite? $isInfiniteValue');
}

Output

Is 42 infinite? false

Summary

In this Dart tutorial, we learned about isInfinite property of num: the syntax and few working examples with output and detailed explanation for each example.