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## addprimesum
### Instructions
5 years ago
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
$ go run . 5
10
$ go run . 7
17
$ go run . -2
0
$ go run . 0
0
$ go run .
0
$ go run . 5 7
0
$
6 years ago
```