1. CS 240 – Computer Programming I Lab Kalpa Gunaratna – kalpa@knoesis.orgkalpa@knoesis.org http://knoesis.wright.edu/researchers/kalpa/

2. Contact  Contact by e-mail  kalpa@knoesis.org kalpa@knoesis.org  Office hours  376 Joshi  Mondays & Wednesday 3:00 pm – 4:00 pm

3. Intention  Familiar yourself with various loops available in Java language.  Some loops have advantages above others but all loops can be used most of the time for many tasks.  Loops,  for, while, do while  Any loop can be nested in whatever you want and for your requirement.

4. while loop  while ( ) { // loop body } Until the boolean condition is false Loop will iterate. First checks the condition and execute The body. true false

5. do – while loop  do { // loop body } while ( )  Loops body is executed at least before checking the condition. truefalse

6. for loop  Steps, initial action (only once) -> check condition -> body -> final action -> loop true false

7.  Following two for loops and while loop are equivalent. for( ; ; ){ // do something } for( ; true; ) { // do something } while( true ){ // do something }

8. In lab  Remember the last week’s lab about printing a triangle.  Numbers you have to print is all about powers of 2.  Math.pow(2, );  Numbers should be exactly as they are shown in the assignment and also they should align in the exact way !

9. Post lab  Repeat the same process as you did in in lab and use whole and do – while loops. No for loops !  You should use at least one of while and do – while loops.