Math in Dart

Math In Dart

Math helps you to perform mathematical calculations efficiently. With dart math, you can generate random number, find square root, find power of number, or round specific numbers. To use math in dart, you must import 'dart:math';.

How To Generate Random Numbers In Dart

This example shows how to generate random numbers from 0 - 9 and also 1 to 10. After watching this example, you can generate a random number between your choices.

import 'dart:math';
void main()
{
Random random = new Random();
int randomNumber = random.nextInt(10); // from 0 to 9 included
print("Generated Random Number Between 0 to 9: $randomNumber");
  
int randomNumber2 = random.nextInt(10)+1; // from 1 to 10 included  
print("Generated Random Number Between 1 to 10: $randomNumber2"); 
}

Generated Random Number Between 0 to 9: 8
Generated Random Number Between 1 to 10: 4

• In this program, random.nextInt(10) function is used to generate a random number between 0 and 9 in which the value is stored in a variable randomNumber.

• The random.nextInt(10)+1 function is used to generate random number between 1 to 10 in which the value is stored in a variable randomNumber2.

Generate Random Number Between Any Number

Use this formula to generate a random number between any numbers in the dart.

 min + Random().nextInt((max + 1) - min);

Example: Random Number In Dart Between 10 - 20.

This program generates random numbers between 10 to 20.

import 'dart:math';
void main()
{

int min = 10;
int max = 20; 

int randomnum = min + Random().nextInt((max + 1) - min);
  
print("Generated Random number between $min and $max is: $randomnum");  
}

Generated Random number between 10 and 20 is 19

Random Boolean And Double Value

Here you will learn how to generate random boolean and double values in dart.

  Random().nextBool(); // return true or false
  Random().nextDouble(); // return 0.0 to 1.0

Example 1: Generate Random Boolean And Double Values

This example below generate random and boolean value.

import 'dart:math';
void main()
{
double randomDouble = Random().nextDouble();
bool randomBool = Random().nextBool();
  
print("Generated Random double value is: $randomDouble");  
print("Generated Random bool value is: $randomBool");  
}

Generated Random double value is: 0.6120530538023836
Generated Random bool value is: false

Example 2: Generate a List Of Random Numbers In Dart

This example will generate a list of 10 random numbers between 1 to 100.

import 'dart:math';
void main()
{
List<int> randomList = List.generate(10, (_) => Random().nextInt(100)+1); 
print(randomList);  
}

[94, 68, 21, 66, 86, 82, 70, 46, 66, 69]

Useful Math Function In Dart

You can use some useful math functions to perform your daily task with dart programming.

Example: Math In Dart

This example below finds the power of a number, a minimum and maximum value between two numbers, and the square root of a number.

import 'dart:math';
void main()
{
  int num1 = 10;
  int num2 = 2;

  num powernum = pow(num1,num2);
  num maxnum = max(num1,num2);
  num minnum = min(num1,num2);
  num squareroot = sqrt(25); // Square root of 25
  
  print("Power is $powernum"); 
  print("Maximum is $maxnum"); 
  print("Minimum is $minnum"); 
  print("Square root is $squareroot"); 
  
}

Power is 100
Maximum is 10
Minimum is 2
Square root is 5.0

• In this program, pow(num1, num2) is a function where num1 is a digit and num2 is a power.
• max(num1,num2) is a function which give the maximum number between num1 and num2.
• min(num1,num2) is a function which give the mininum number between num1 and num2.
• sqrt(25) is a function that gives the square root of 25.

Video

Watch our video on math in Dart.