Dart num ceilToDouble()
Syntax & Examples

num.ceilToDouble() method

The `ceilToDouble` method in Dart returns the least double integer value no smaller than the given number.

Syntax of num.ceilToDouble()

The syntax of num.ceilToDouble() method is:

 double ceilToDouble()

This ceilToDouble() method of num returns the least double integer value no smaller than this.

Return Type

num.ceilToDouble() returns value of type double.


✐ Examples

1 Ceil to double of a decimal number

In this example,

  1. We create a num variable num1 with the value 4.2.
  2. We use the ceilToDouble() method to get its ceiling value as a double.
  3. We then print the result to standard output.

Dart Program

void main() {
  num num1 = 4.2;
  double ceilValue = num1.ceilToDouble();
  print('Ceil to double of $num1: $ceilValue');
}

Output

Ceil to double of 4.2: 5

2 Ceil to double of a negative decimal number

In this example,

  1. We create a num variable negativeNum with the value -3.8.
  2. We use the ceilToDouble() method to get its ceiling value as a double.
  3. We then print the result to standard output.

Dart Program

void main() {
  num negativeNum = -3.8;
  double ceilValue = negativeNum.ceilToDouble();
  print('Ceil to double of $negativeNum: $ceilValue');
}

Output

Ceil to double of -3.8: -3

3 Ceil to double of an integer

In this example,

  1. We create a num variable integerNum with the value 7.0, which is already an integer.
  2. We use the ceilToDouble() method to get its ceiling value as a double.
  3. We then print the result to standard output.

Dart Program

void main() {
  num integerNum = 7.0;
  double ceilValue = integerNum.ceilToDouble();
  print('Ceil to double of $integerNum: $ceilValue');
}

Output

Ceil to double of 7: 7

Summary

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