Can anybody tell me how to check prime number in c++ using if else statement

Question

Which condition will I put
I think
if(a%==0)

Answer 1

Check the code section.

Answer 2

What conditions do you think we need to check for a number to be prime? Or first tell us what is a prime number.

Answer 3

Just loot at the code section

Answer 4

A prime number n is only divisible by 1 and itself

Logics you need to check if a number n is divisible by 2...n/2 and if its divisible by any numbers in the range 2...n/2 then n is not a prime number else it is a prime number.