GCD of two numbers

#include<stdio.h>
main()
{
int n1,n2,i,gcd;
printf("Enter two integer:");
scanf("%d%d",&n1,&n2);
for(i=1;i<=n1&&i<=n2;++i)
{
if(n1%i==0 && n2%i==0)
gcd=i;
}
printf("GCD of %d and %d is %d",n1,n2,gcd);
}