program to calculate perimeter of rectangle
class perimeter
{
public static void main(String args[])
{
int peri, length, breadth;
length=10;
breadth=29;
peri=2*(breadth+length);
System.out.println(peri);
}}
How to print 9,99,8,89,7,79....
/ common way to write int a=9,n=10 ; // n value you can take anything for(int i=1;i<=n;i++) { if(i%2==1) { System.out.print(a); } else { System.out..print(a*10+9); a--; }}
Very helpful for beginners...
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