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54 lines
1.2 KiB
54 lines
1.2 KiB
5 years ago
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## findprevprime
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## **WARNING! VERY IMPORTANT!**
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For this exercise a function will be tested **with the exam own main**. However the student **still needs** to submit a structured program:
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This means that:
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- The package needs to be named `package main`.
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- The submitted code needs one declared function main(\`\`\`func main()\`\`\`) even if empty.
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- 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 testings are done.
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- Every other rules are obviously the same than for a \`program\`.
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### Instructions
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Write a function that returns the first prime number that is equal or inferior to the `int` passed as parameter.
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If there are no primes inferior to the `int` passed as parameter the function should return 0.
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### Expected function
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```go
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func FindPrevPrime(nb int) int {
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}
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```
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### Usage
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Here is a possible [program](TODO-LINK) to test your function :
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```go
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package main
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import (
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"fmt"
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)
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func main() {
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fmt.Println(FindPrevPrime(5))
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fmt.Println(FindPrevPrime(4))
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}
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```
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And its output :
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```console
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student@ubuntu:~/piscine-go/test$ go build
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student@ubuntu:~/piscine-go/test$ ./test
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5
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3
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student@ubuntu:~/piscine-go/test$
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```
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