Math Functions and Constants - Dart Programming

The dart:math library adds common math helpers on top of the int/double operators: max(a, b) and min(a, b) pick the larger or smaller of two values; sqrt(x) returns the square root as a double; pow(x, y) raises one number to another; the constant pi is the IEEE-754 double closest to the true value. Combine pi, round(), and / to format a fixed-decimal approximation without a printf.

Program

Play the program to compare two numbers, take a square root, raise a power, and round pi to two decimal places.

dart_math.dart

import 'dart:math';

void main() {
  var biggest = max(12, 7);
  var smallest = min(12, 7);
  var root = sqrt(144);
  var cube = pow(2, 10);
  var rounded = (pi * 100).round() / 100;
  print('$biggest $smallest $root $cube $rounded');
}

max and min `max(a, b)` and `min(a, b)` return whichever operand wins; when both operands are `int`, the result stays `int`.

sqrt and pow `sqrt(x)` returns a `double` square root; `pow(x, y)` returns `num` and picks `int` automatically when both operands are non-negative `int`.

pi `pi` is the IEEE-754 `double` closest to the true value of pi. `(pi * 100).round() / 100` builds a 2-decimal approximation without `toStringAsFixed`.