February 3 Notes

Project 2 due Friday at midnight CodeLab (conditionals, loops) due Monday at midnight SAS exam review: Sunday 7-9pm, Carter Learning Center Exam 1 Tuesday during class break: leave the structure we?re in (switch, loop) continue: skip the rest of the current iteration, start on the next one while (?) { ? continue; rest of statements } Example: write a for-loop that adds 10 numbers from the user and prints the sum. If the user enters a negative number, stop early and print sum up to that point. Example: same idea, but just skip all the negative numbers Nested loops outer loop { inner loop { statements } statements } Often done with ?grids? of elements Print: * * * * * * * * * * * * * * * * * * * * 4 rows, 5 columns outer loop goes through all the rows inner loop goes through all cols (elements on cur. row) Now we want to print: 0 1 2 3 4 0 1 2 3 4 0 1 2 3 4 0 1 2 3 4 Next, print: 0 : row 0, 1 element 0 1 : row 1, 2 elements 0 1 2 0 1 2 3 0 1 2 3 4 Example: repeatedly ask user for a number until they want to quit each time, print the left-most digit of the number outer loop: keep looping as long as they want to continue ask for a number while number is > 9, divide it by 10 print the remaining (left-most digit) ask if want to continue Example: printing the factors of a number 12 = 2 * 2 * 3 loop through possible factors inner loop loops through repetitions of current factor