KwickClips Java · 40 sec · free
How do you roll a dice in Java?
Short answer. int d = (int)(Math.random() * 6) + 1;
What is the general rule?
Multiply by max - min + 1, cast to int, then add min.
Remember
| (int)(random * size) + min |
| size = max - min + 1 |
Math dot random gives zero to one. How do we get one to six? Times six gives zero to below six. Cast to int gives zero to five. Plus one gives one to six. Remember. Multiply by the size, cast, then add min.
This clip is from the full lesson: Mathematical Library Methods — 7 minutes, with the tables, the quick answers and the whole lesson in text.
Useful for: CBSE Class 11 Information Technology (802), ICSE Class 9 Computer Applications, ICSE Class 10 Computer Applications, Cambridge IGCSE Grade 10 Computer Science (0478)
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