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## addprimesum
### Instructions
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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'`).
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- 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.
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### Usage
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```console
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$ go run . 5
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10
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$ go run . 7
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17
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$ go run . -2
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0
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$ go run . 0
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0
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$ go run .
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0
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$ go run . 5 7
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0
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$
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```
