# Prime Numbers in Every Language

Published on 01 November 2018 (Updated: 17 January 2019)

A prime number is a positive integer which is divisible only by 1 and itself. For example: 2, 3, 5, 7, 11, 13

Since every number is divisible by One so, Two is the only even and the smallest prime number.

## Requirements

Create a file called Prime Number using the naming convention appropriate for your language of choice.

Write a sample program which accepts an integer on the command line and outputs if the integer is a Prime number or not.

## Testing

The following table contains various test cases that you can use to verify the correctness of your solution:

Description Input Output
No Input   “Usage: please input a non-negative integer”
Empty Input ”” “Usage: please input a non-negative integer”
Invalid Input: not a number a “Usage: please input a non-negative integer”
Invalid Input: not an integer 6.7 “Usage: please input a non-negative integer”
Invalid Input: negative -7 “Usage: please input a non-negative integer”
Sample Input: Zero 0 Composite
Sample Input: One 1 Composite
Sample Input: Two 2 Prime
Sample Input: Small Composite 4 Composite
Sample Input: Small Prime 7 Prime
Sample Input: Large Composite 4011 Composite
Sample Input: Large Prime 3727 Prime