## addprimesum

### Instructions

Write a program that takes a positive integer as argument and displays the sum of all prime numbers inferior or equal to it followed by a newline.

- If the number of arguments is not 1, or the argument is not a positive number, just display 0 followed by a newline.

Example of output :

```console
student@ubuntu:~/piscine/test$ go build
student@ubuntu:~/piscine/test$ ./test 5
10
student@ubuntu:~/piscine/test$ ./test 7
17
student@ubuntu:~/piscine/test$ ./test 57
0
student@ubuntu:~/piscine/test$
```