To Display Prime Numbers From m to n

//To Display Prime numbers from m to n

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#include<stdio.h>
#include<ctype.h>
#include<conio.h>
void main()
{
 int j,fact ;
 char ch;
 long int m, n,i;
  clrscr();
do
{
 printf("\nEnter the number From which you want to add prime number: " );
 scanf("%ld",&m);
 printf("\nUpto which number: ") ;
 scanf("%ld",&n);
 clrscr();
 printf("\nPrime nos. between %ld to %ld are:\n",m,n);

 for(i=m;i<=n;i++)
 {fact=0;
 for(j=1;j<=i;j++)
 {
 if (i%j==0)
 fact++;
 }
 if(fact==2)
 printf(" %d ",i);

 }

 printf("\n\n\nRe-enter(y/n)?");
 ch=getch();
 }while(tolower(ch)!='n');

 getch();
}
/*
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