Question

What expressions will initialize d with a random value such that all possible values for d are given by the inequality 1.5 ≤ d < 7.5?

Answer 1

Answer:

The solution code is written in Python

d = 1.5 + random.random() * 6

Explanation:

By presuming the Python random module is imported, we can use the random method to generate a random number.  random.random() will give us a value in the range [0, 1). The ensure the lower limit is 1.5 instead of 0, we can add 1.5 to random.random()

•      1.5 + random.random()

This expression will give any value in range [1.5, 2.5)

To ensure the upper limit is set to 7.5, we tweak the previous expression to

• 1.5 + random.random() * 6  

This expression will always multiply a random number from [0,1) with 6 and then only added with 1.5. This will always produce a random number that fulfill the inequality 1.5 ≤ d < 7.5