Discussion
What two statements are true about the result obtained from calling Math.random()?
1. The result is less than 0.0.
2. The result is greater than or equal to 0.0.
3. The result is less than 1.0.
4. The result is greater than 1.0.
5. The result is greater than or equal to 1.0.
Answer: B
Correct answer: 2 and 3
Statements 2 and 3 state the two halves of the range: the result is greater than or equal to 0.0 and strictly less than 1.0. Statements 1, 4 and 5 all put it outside that interval. The asymmetry - inclusive at the bottom, exclusive at the top - is deliberate and is what makes the value safe to multiply by a range and truncate.
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