Write down the syntax of a nested for loop.

Give the output of the following Java program snippet based on nested loops:

int i,j;
for (i=0; i<4; i++)
{
for (j=i; j>=0; j--) 
System.out.print(j); 
System.out.println();
}

Give the output of the following Java program snippet based on nested loops:

int a,b; 
for (a=1; a<=2; a++)
{
for (b= (64+a); b<=70; b++) 
System.out.print((char) b); 
System.out.println( );
}

Give the output of the following Java program snippet based on nested loops:

int x,y; 
for(x=1; x<=5; x++)
{
for(y=1; y<x; y++)
{
if(x == 4)
    break; 
    System.out.print(y);
}
System.out.println( );
}