C++ Program to check whether number is prime or not.
You must have basic knowledge of C++ programming language and variable , while loop and if..ealse and for loop
What is prime number?
The prime number mean which postive integer number is divided by 1 or itself.
The prime number such as 13 that is division itself and 1.
In this example we show the prime number is [1,2,3,5,7,11,13,17,19,22]
Example 1: Program to Check Prime Number given by user.
#include<iosteam>
#include <conio.h>
int main ( )
{
int m,j,flag=0;
cout<<"please enter the any positive number";
cin>>m;
for(j=2;j <=n/2;i++)
{
//this condition is use for non prime
if (m%j==0)
{
flag=1;
break;
}
}
if(flag==0)
cout <<m <<"This number is prime";
else
cout <<m <<"This number is not prime";
return 0;
getch ();
}
}
Result
------------------------
Please enter the any positive numer
8
8 This number is not prime
Example2: Program to Check Prime Number
#include<iosteam>
#include <conio.h>
int main ( )
{
int m=7,j,flag=0;
for(j=2;j <=n/2;i++)
{
if (m%j==0)
{
flag=1;
break;
}
}
if(flag==0)
cout <<m <<"This number is prime";
else
cout <<m <<"This number is not prime";
return 0;
getch ();
}
}
Output
------------------------
7 This number is prime
