KwickClips Java · 41 sec · free
Why is (double)(7/2) only 3.0?
Short answer. The brackets make int division happen first, giving 3, which is then widened.
How do you get 3.5?
Cast before dividing: (double)7 / 2.
Where is the cast?
| Code | Prints |
|---|---|
| (double)7 / 2 | 3.5 |
| (double)(7/2) | 3.0 |
Remember
| Brackets decide the order |
| int / int drops decimals |
Two lines, one small bracket. Predict both outputs. First, seven becomes seven point zero, so three point five. Second, seven by two is three first. So three point zero. Brackets decide the order. Int by int drops decimals.
This clip is from the full lesson: Type Conversion in Java: Implicit and Explicit Casting — 7 minutes, with the tables, the quick answers and the whole lesson in text.
Useful for: ISC Class 11 Computer Science (868), ISC Class 12 Computer Science (868), Programming All levels Java
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