Define integers and floats:
var a:Float = 34; // Float var b:Int = 34; // Int var c = 34.00; // Float var d = 34; // Int
Calculating numbers using arithmetic operators:
var a = 10; var b = 20; var c = (a + (2 * b)) / 5; trace(c); // 10 (Float)
Haxe interprets numeric constants as hexadecimal if they are preceded by 0x:
var value = 0xFF; // 255 (Int)
Extra large or small numbers can be written with scientific exponent notation:
var x = 123e5; // 12300000 var y = 123e-5; // 0.00123
Floating point arithmetic is not always 100% accurate
var value = 0.1 + 0.2; // 0.30000000000000004
Creating random numbers:
Std.random(10); // a random Int between 0 (included) and 10 (excluded) Math.random(); // a random Float between 0.0 (included) and 1.0 (excluded)
Defines infinity. Value equals infinity:
var value = 1 / 0; // infinity trace((1 / 0) == Math.POSITIVE_INFINITY); // true trace((-1 / 0) == Math.NEGATIVE_INFINITY); // true
Defines and check to NaN (Not A Number).
var value = Math.sqrt(-1); // NaN trace(Math.isNaN(value)); // true
Parsing numbers
Parsing String to Int:
Std.parseInt("3"); // 3 Std.parseInt("3.5"); // 3 Std.parseInt("3 kilo"); // 3 Std.parseInt("kilo: 3.5"); // null
Parsing String to Float:
Std.parseFloat("3"); // 3.0 Std.parseFloat("3.5"); // 3.5 Std.parseFloat("3.5 kilo"); // 3.5 Std.parseFloat("kilo: 3.5"); // Math.NaN
Convert Float to Int:
var value:Float = 3.3; Std.int(value); // 3 Math.floor(value); // 3 Math.round(value); // 3 Math.ceil(value); // 4
Convert numbers to string:
var myInt = 10; var myFloat = 10.5; Std.string(myInt); // "10" Std.string(myFloat); // "10.5"
Math
Calculating degrees to radians and radians to degrees:
var radians = Math.PI * 2; var degrees = radians * 180 / Math.PI; var radians = degrees * Math.PI / 180;
Using sinus and cosinus to set the position at a distance from the given angle:
var angle = Math.PI; var distance = 100; var x = Math.cos(angle) * distance; var y = Math.sin(angle) * distance;
Calculating the angle of two points:
var point1 = {x: 350, y: 0} var point2 = {x: 350, y: 150} var dx = point2.x - point1.x; var dy = point2.y - point1.y; var angle = Math.atan2(dy, dx); trace(angle); // PI/2
API documentation
Manual
