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# Prime Number in C++

Program to determine whether a given number is prime or not

• #include<iostream>

• using namespace std;

• int main()

• {

• int num;

• cout<<”Enter Number”<<endl;

• cin>>num;

• int flag=0;

• for(int i=2; i<num/2; i++)

• {

• if(num%i==0)

• {

• flag=1;

• break;

• }

• }

• if(flag==0)

• {

• cout<<”Number is prime”;

• }

• else

• {

• cout<<”Number is not prime”;

• }

• return 0;

• }

Output –

Enter Number

7

Prime

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