Answer Posted / pravin

#include<iostream>
using namespace std;
int main()
{
int num,i,j,flag;
cout<<"enter the no. up2 which u want prime no's:";
cin>>num;
for(i=2;i<=num;i++)
{
flag=1;
for(j-2;j<i/2;i++)
{
if(i%j==0)
flag=0;
}
if(flag==1)
cout<<i<<" ";
}
}

shorting algorithmS

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