Dart: 2 Ways to Calculate the Power of a Number (Exponentiation)

This concise and code-focused article shows you 2 different ways to find the power of a given number in Dart.

Using the pow() method

The pow() method from the math library (a built-in library of Dart) can be used for exponentiation. It takes two arguments: base and exponent. Here’s the syntax:

result = pow(base, exponent)

base and exponent can be integers or doubles, positive or negative, or zero.

Example:

import 'dart:math';

void main() {
  var result1 = pow(2, 3);
  var result2 = pow(-3, 3);
  var result3 = pow(1.5, 1.5);

  print('Result 1: $result1');
  print('Result 2: $result2');
  print('Result 3: $result3');
}

Output:

Result 1: 8
Result 2: -27
Result 3: 1.8371173070873836

Using a loop

Although the preceding approach is good and recommended, we still add this method for your reference.

Example

This example calculate the power of 5 to the 3rd power:

void main() {
  int result = 1;
  for (int i = 0; i < 3; i++) {
    result *= 5;
  }

  print(result);
}

Output:

125

The limitation of this approach is that the exponent number must be a positive integer.

Further reading:

• How to add/remove a duration to/from a date in Dart
• 2 Ways to Get a Random Item from a List in Dart (and Flutter)
• 3 Ways to Cancel a Future in Flutter and Dart
• How to Create a Sortable ListView in Flutter
• Flutter: 2 Ways to Create an Onboarding Flow (Intro Slider)
• 2 Ways to Create Typewriter Effects in Flutter

You can also tour around our Flutter topic page or Dart topic page for the most recent tutorials and examples.