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## 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 (`'\n'`).
- If the number of arguments is different from 1, or if the argument is not a positive number, the program displays `0` followed by a newline.
### Usage
```console
student@ubuntu:~/[[ROOT]]/test$ go build
student@ubuntu:~/[[ROOT]]/test$ ./test 5
10
student@ubuntu:~/[[ROOT]]/test$ ./test 7
17
student@ubuntu:~/[[ROOT]]/test$ ./test 5 7
0
student@ubuntu:~/[[ROOT]]/test$ ./test
0
student@ubuntu:~/[[ROOT]]/test$
```
