State one difference and one similarity between while loop and do-while loop.

State one similarity and one difference between while and for loop.

Predict the Output of the following Java program:

class dkl
{
public static void main(String args[])
{
int i;
for(i = -1;i<10;i++)
{
System.out.println(++i);
} 
} 
}

Predict the Output of the following Java program:

class dk2
{
public static void main(String args[])
{
int i=2,k=1;
while (++i<6)
k *= i;
System.out.println(k);
} 
}