Write a C++ Program to Check a number is Prime or not

By | December 25, 2016

Check a number is Prime or not


Write a C++ Program to Check given number is Prime number or not. Here’s simple C++ Program to Check given number is Prime number or not in C++ Programming Language.


A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself. It means a prime number is only divisible by 1 and itself, and it start from 2. The smallest prime number is 2

Here is source code of the C++ Program to Check given number is Prime number or not. The C++ program is successfully compiled and run(on Codeblocks) on a Windows system. The program output is also shown in below.


SOURCE CODE : :



Output : :



Above is the source code for C++ Program to Check given number is Prime number or not which is successfully compiled and run on Windows System.The Output of the program is shown above .

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2 thoughts on “Write a C++ Program to Check a number is Prime or not

    1. codezclub Post author

      but it’s not possible,Since we create a condition ::
      if(n%i==0)
      then break;

      In case of n=10, when i=2, then 10%2==0 condition satisfied and it breaks out of loop and i remains 2. So, i did not reach 10 in case n=10 and if(n==i) not satisfied, So it is not prime number. Hope u got it……Thanks for commenting

      Reply

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