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Chapter 4: Problem 27

Assume \(x\) is a double variable, and rand references a Random object. What does the following statement do? x = rand.nextDouble();

Short Answer

Expert verified
Answer: The 'nextDouble()' method of a Random object returns a random double value between 0 (inclusive) and 1 (exclusive). The purpose of the Java statement 'x = rand.nextDouble();' is to assign the random double value generated by the 'nextDouble()' method to the variable 'x', storing it for further use in the Java program.

Step by step solution

01

Understand the Random Class and 'nextDouble()' method

In Java, the Random class allows us to generate random numbers. The 'nextDouble()' method is a part of the Random class and it returns a random double value between 0 (inclusive) and 1 (exclusive). Therefore, when calling this method, the returned value will be a double ranging from 0 to just less than 1.
02

Assign the random value to 'x'

In this step, the statement 'x = rand.nextDouble();' is used to assign the random double value generated by the 'nextDouble()' method to the variable 'x'. This means that after the statement is executed, 'x' will hold a random double value between 0 and just less than 1. The main purpose of this statement is to generate a random double value and store it in the double variable 'x' for further use in the Java program.

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