(I honestly can't see anything wrong here.
Code:#include <stdio.h> int main() { int num1; /*Variable to hold num*/ printf:("Please enter a number:\n"); scanf:("%d" &num1); if (num1%2==0) /*If clause to determine if number is prime*/ { printf("Number %d is a prime number.\n" ,num1); } else { printf("Number %d is not a prime number.\n" ,num1); } return 0; /*Exits the program*/ }