# 隨機的世界真美麗

## 工具：本篇會用到的程式積木有

![](https://1037909400-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LLwwLAd_-l8YsFemhSH%2F-LLx8GfUG795yx47U26a%2F-LLx8M8xzv0BWndCpqLb%2Fradom5.PNG?alt=media\&token=34d921e3-dffd-4f0e-8c50-caa677370957)

## 暖身：隨機選取一個三位數並說出來

![三位數的範圍為100-999](https://1037909400-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LLwwLAd_-l8YsFemhSH%2F-LLwy_I09QjlAQMOSDVL%2F-LLwzEpznVsHUzUpZlQI%2Fradom1.PNG?alt=media\&token=8cb1ac08-1d73-44c8-867e-817ba48d22d0)

## 練習：隨機選取一個三位數，如果這個三位數是3的倍數，就放進清單中，直到取出10個為止

![](https://1037909400-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LLwwLAd_-l8YsFemhSH%2F-LLwzh7Gy8lO1bjQ6thH%2F-LLx-qv9JBRZb_MCz6eg%2Fradom2.PNG?alt=media\&token=78917eb3-0a24-4e1b-a1fa-7d058c56caf6)

1. 先建立一個變數命名為「抽籤」，和建立一個清單
2. 變數「抽籤」設為隨機抽取一個三位數
3. 判斷式：如果被抽出來的數(抽籤)能被3整除，就放進清單中
4. 重複直到清單的項目數有10個為止

{% hint style="info" %}
初始化設定：點綠旗後先清空清單項目，才能每次點綠旗都抽10個
{% endhint %}

## 暖身：隨機抽取10個十以內的數，放進清單中

![只是重複選數10次，放進清單中的數可能會有重複](https://1037909400-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LLwwLAd_-l8YsFemhSH%2F-LLx-uHj1-qQXtdPsubz%2F-LLx3cH8OAkGIrjh7xnH%2Fradom4.PNG?alt=media\&token=4b5374eb-4343-473f-9d3f-84b68096f151)

## 本篇任務：隨機選取10個十以內的數放進清單，但不能重複

![](https://1037909400-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LLwwLAd_-l8YsFemhSH%2F-LLx-uHj1-qQXtdPsubz%2F-LLx4GENYB6DX76nD7oL%2Fradom3.PNG?alt=media\&token=0f2b5e1a-879f-4bfa-9014-a06baa31b375)

1. 先建立一個變數命名為「中獎」，和建立一個清單
2. 變數「中獎」設定為隨機抽取1-10之間的數
3. 判斷式：抽出來的數如果已經出現在清單過，就什麼也不做，如果沒有出現過就新增的清單中
4. 重複執行到清單的項目數有10個為止

{% hint style="info" %}
判斷式中也可以加入如果已經出現過就說「這個數出現過了重抽」，如果沒有說「沒出現過哦，加入清單」之後才加進清單試試!
{% endhint %}


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