137. Python Program to Check a Prime Number Using a Function

Overview

Return a boolean, and return early from inside a loop.

Problem Statement

A prime number is a whole number bigger than 1 that can only be divided evenly by 1 and by itself. 2, 3, 5 and 7 are prime; 4, 9 and 1 are not.

Write a function is_prime(n) that returns True if n is prime and False if it isn't. Then read a whole number and print one of these, like this for 7:

7 is prime

or, for 9:

9 is not prime

Use input() with no prompt text: the tests type the input for you, and a prompt would end up in your output.

Input

One whole number from 1 to 1000. Example:

7

Output

The output for that example:

7 is prime

The tests try 5 different inputs, including 1 and 2.