Course Introduction
Programs for practice
Following C++ program ask the user to enter a number to check whether it is a prime number or not, then display it on the screen:
Source Code: To find if a number is prime or not
/* C++ Program - To take a number as an input from user and Check if it is Prime or Not */
#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
int num,i,count=0;
cout<<"Enter a number:";
cin>>num;
for(i=2;i<num;i++)
{
if(num%i==0)
{
count++;
break;
}
}
if(count==0)
{
cout<<"This is a prime number";
}
else
{
cout<<"This is not a prime number";
}
getch();
}
Output
Enter a number: 7
This is a prime number
