"Random" redirects here. For random page on the wiki, see Special:Random.
 随机取数 () 到 () `隨機取數 (1) 到 (10)` 类别 运算类积木 形狀 椭圆形积木

The Pick Random () to () 积木 is an 运算类积木 and a 椭圆形积木. The block picks a pseudorandom number ranging from the first given number to the second, including both endpoints. If both numbers have no decimals, it will report a whole number. For example, if a 1 and a 3 were inputed, the block could return a 1, 2 or 3. If one of the numbers has a decimal point, even .0, it reports a number with a decimal. For example, if 0.1 and 0.14 were given, the output will be 0.1, 0.11, 0.12, 0.13, or 0.14.

The numbers given with this block are not truly random — they are merely unpredictable. It is nearly impossible to generate truly random numbers using a computer.

## 历史

In the 实验查看器, the block had a picture of a die on it.

## 用法示例

In many types of 专案, random numbers must be picked — this block will easily do the job, without any complicated scripts.

Some common uses for the Pick Random () to () block:

• Creating randomized levels
```當收到訊息 [generate v]

替換第 (square) 項於 [level v] 成 (隨機取數 (1) 到 (10))
變數 [square v] 改變 (1)
end

重複 (11) 次
造型換成 (清單第 (square) 項項目\( [level v] \) :: list)
蓋章
x 改變 (10)
變數 [square v] 改變 (1)
end
定位到 x: (-50) y: ((y 座標) - (10))
end

變數 [start v] 設為 (隨機取數 (1) 到 (121))
end

如果 <(x座標) = > 那麼
定位到 x: (-50) y: ((y 座標) - (10))

x 改變 (10)
end
變數 [square v] 改變 (1)
end

```
• Setting random stats
```變數 [hp v] 設為 (隨機取數 (25) 到 (100))
```
• Choosing random objects
```變數 [purchase v] 設為 (清單第 (隨機取數 (1) 到 (9)) 項項目\( [grocery list v] \) :: list)
```
```造型換成 (隨機取數 (1) 到 (7))
```

## 应用

Main article: List of Block Workarounds

To work around this block, the Scratcher must program a 程式 that will give unpredictable numbers.

A simple workaround is to fill a 清单 with the possible numbers, and then use the 清单第 () 项项目 block with the first input set to any. The Item (any) of () block chooses an unpredictable item — so if the chosen list has all the wanted numbers, the Item () of () block is an effective workaround:

```當 @greenflag 被點擊

```

There are scripts that can pick unpredictable numbers without using any blocks that give random values. To make these scripts, a value must be used that is unpredictable — the 计时器 is a very good choice. Other choices are:

• Continuously moving a hidden sprite around the screen and using its location
• Continuously changing a 变量 and using its current value
• Continuously changing the pen color, shade or size and using its value

Then a script can be created with the value — an example with a continuously moving sprite:

```變數 [random number v] 設為 (x 座標)
```

This, however, is rather simple. More complicated scripts can be made:

```變數 [random number v] 設為 ((x座標) + (y 座標))
```
```變數 [random number v] 設為 (四捨五入數值 (((y 座標) + ((方向) * (2))) / (3)))
``` Note: The random numbers generated from these alternatives may not be as accurate as the Pick Random () to () block.
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