Flex, how to round a number, how to convert a Number to Integer, a Number to Text

problem:

Working with numbers (with decimals) might be a nightmare, as a simple division may create a huge number of decimals. The problem is not the calculation but the storing this kind of data in sql databases and the calculation consume a lot of cpu. In case you develop an application that you want to work very fast the solution is to round the number after a division or multiplication.

solutions:

1. Convert a Number to String

toFixed property of Number

The following example shows how toFixed(3) returns a string that rounds to three decimal places.

var num:Number = 7.31343;

trace(num.toFixed(3)); // 7.313


The following example shows how toFixed(2) returns a string that adds trailing zeroes.
var num:Number = 4;
trace(num.toFixed(2)); // 4.00

2. Round a Number (number -> number, no conversion) 

Math.round(val:Number):Number 

The silly thing is that this function doesn't get argument for how many decimals to you want.
This round function rounds the 0.5 to 1.

3. Convert a Number to Int (rounding)
int(Math.round(0.665)) //  returns 1

4. Convert a String to Int
var myInt:int = parseInt(input.text);

5. Convert a String to Number

var myFloat:Number = parseFloat(input.text);