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isprime

Intructions

Write a function that returns true if the int passed as parameter is a prime number. Otherwise it returns false.

The function must be optimized in order to avoid time-outs with the tester.

Expected function

func IsPrime(int nb) bool {

}

Usage

Here is a possible program to test your function :

package main

import (
	"fmt"
	piscine ".."
)

func main() {
	fmt.Println(piscine.IsPrime(5))
	fmt.Println(piscine.IsPrime(4))
}

And its output :

student@ubuntu:~/piscine-go/test$ go build
student@ubuntu:~/piscine-go/test$ ./test
true
false
student@ubuntu:~/piscine-go/test$