dart:math

The dart:math library (API reference) provides common functionality such as sine and cosine, maximum and minimum, and constants such as pi and e. Most of the functionality in the Math library is implemented as top-level functions.

To use this library in your app, import dart:math.

import 'dart:math'; 

The Math library provides basic trigonometric functions:

// Cosine assert(cos(pi) == -1.0); ​ // Sine var degrees = 30; var radians = degrees * (pi / 180); // radians is now 0.52359. var sinOf30degrees = sin(radians); // sin 30° = 0.5 assert((sinOf30degrees - 0.5).abs() < 0.01); 

The Math library provides max() and min() methods:

assert(max(1, 1000) == 1000); assert(min(1, -1000) == -1000); 

Find your favorite constants—pi, e, and more—in the Math library:

// See the Math library for additional constants. print(e); // 2.718281828459045 print(pi); // 3.141592653589793 print(sqrt2); // 1.4142135623730951 

Generate random numbers with the Random class. You can optionally provide a seed to the Random constructor.

var random = Random(); random.nextDouble(); // Between 0.0 and 1.0: [0, 1) random.nextInt(10); // Between 0 and 9. 

You can even generate random booleans:

var random = Random(); random.nextBool(); // true or false 

Refer to the Math API reference for a full list of methods. Also see the API reference for num, int, and double.