Question

(PYTHON)

A Prime number is an integer greater than 1 that cannot be formed by multiplying two smaller integer other than 1 and itself. For example, 5 is prime because the only ways of writing it as a product, 1 × 5 or 5 × 1.

In this question you will write a program that takes a sequence of integers from the user and display all the prime numbers contained in that sequence.

We will separate this question in 2 steps:

Step 1 (5 pts) Write a script that accepts a sequence of positive integer from the user and display all the prime numbers from that sequence. Your program should accept and save in a list the input from the user until the value -1 is entered. Your program should also make sure that only positive values are entered. You can assume the users only enter integers.

Step 2 (5 pts) We can improve the program usability by adding the following functions:

- A function is_prime that receives an integer as parameter, check if this integer is a prime number and returns a boolean value depending on the result. -

A function find_primes that receives the user sequence as parameter and use the function is_prime to figure out which are the prime values. The function then returns a list containing all the prime values contained in the user sequence.

Your user input script should be similar as in part 1 and use the result of the find_primes function to display the list of prime numbers.

Answer 1

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