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## priorprime
## **WARNING! VERY IMPORTANT!**
For this exercise a function will be tested **with the exam own main**. However the student **still needs** to submit a structured program:
This means that:
- The package needs to be named `package main`.
- The submitted code needs one declared function main(```func main()```) even if empty.
- The function main declared needs to **also pass** the `Restrictions Checker`(illegal functions tester). It is advised for the student to just empty the function main after its own testing are done.
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- Every other rules are obviously the same than for a `program`.
### Instructions
You are given an integer.
Your function must return sum of all prime numbers prior to the number exclusively. The number is not included.
### Expected function and structure
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```go
package main
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func Priorprime(x int) int {
}
```
### Usage
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Here is a possible program to test your function:
```go
package main
import (
"fmt"
)
func main() {
fmt.Println(Priorprime(14))
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}
```
Its output:
```console
student@ubuntu:~/[[ROOT]]/test$ go build
student@ubuntu:~/[[ROOT]]/test$ ./priorprime
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41
student@ubuntu:~/[[ROOT]]/test$
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```