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created by

anonymous

43 seconds ago

​x
 
#include <iostream>
using namespace std;
​
int prime(int a);
​
int main(){
​
int number {};
​
cout << "Enter a number that you want to check if it is prime or not : " ;
cin >> number;
​
prime(number);
}
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int prime(int a){
    bool all_not_divisible = true;
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    for (int i = 2; i < a ; i++)
    {
        if (a%i == 0)
        {
            all_not_divisible = false; // divisor found!
        }
    }
​
    if (a >= 2 && all_not_divisible)
    {
        cout << a << " is a prime number." << endl;
    }else
    {
        cout << a << " is not a prime number." << endl;
    }
​
    return 0;
}
​

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Enter a number that you want to check if it is prime or not : 1 is not a prime number.

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