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書名： Unreal Development Kit Game Programming with UnrealScript：Beginner's Guide
作者名： Rachel Cordone
本章字數： 294字
更新時間： 2021-08-27 11:59:05

Time for action – Using floats

Floats are used when we need something that doesn't have nice neat values, like how far away something is or how accurate a weapon is. They're declared the same way as our bools and ints, so let's make one now.

Replace our int declaration with this:
```
var float DistanceToGo;
```
Floats have a default value of 0.0. Let's change our PostBeginPlay function to check this.
```
function PostBeginPlay()
{
   'log("Distance to go:" @ DistanceToGo);
}
```
Compile and test, and our log should look like this:
```
[0007.61] ScriptLog: Distance to go: 0.0000
```
We can see that unlike ints, floats will log with a decimal place. Let's see if we can change the value. Add this line to the beginning of our PostBeginPlay function:
```
DistanceToGo = 0.123;
```
Compile and test, and we should see the fraction show up in the log:
```
[0007.68] ScriptLog: Distance to go: 0.123
```
Let's see what happens when we use the same line we did for our int. Change the line to this:
```
DistanceToGo = 10 / 3;
```
Compile and test, and our log should look like this:
```
[0007.68] ScriptLog: Distance to go: 3.3333
```

What just happened?

Floats are used when we need precision in our numbers, such as calculating the distance between two points or the time remaining in a game. We also use them for complex math since they can have fractions.

Strings

No, these are not strings for our kittens to play with. In programming, strings store a series of characters, be it letters, numbers, symbols, or a combination of them. We can use them to hold the name of our character, messages to display on the screen, or the name of the weapon we're holding. Let's take a look at how to use them.

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Unreal Development Kit Game Programming with UnrealScript：Beginner's Guide

Time for action – Using floats

What just happened?

Strings