Question: What is the round function in GameMaker?

Answer

The round function in GameMaker is used to round a floating-point number to the nearest whole number. The way it works is by checking the decimal part of the number; if it's 0.5 or higher, the function rounds up, and if it's lower than 0.5, it rounds down.

Here's an example of how you can use the round function:

var myNumber = 2.7;
var roundedNumber = round(myNumber); // This will be 3

In this case, roundedNumber would contain the value 3 because 2.7 is closer to 3 than to 2.

It's important to note that round differs from floor and ceil functions:

• floor always rounds down to the nearest whole number,
• ceil always rounds up to the nearest whole number.

For instance:

var myNumberDown = 2.7;
var flooredNumber = floor(myNumberDown); // This will be 2

var myNumberUp = 2.3;
var ceiledNumber = ceil(myNumberUp); // This will be 3

Understanding these differences is crucial when performing various mathematical operations in GameMaker, especially when dealing with graphics or logic that depends on integer values.