Unit #5-06

Learning Outcome

At the end of this lesson, you will be able to:

• understand and use a loop statement

Review

• boolean expressions

Lesson

• loops are used to repeat the same commands, over and over again

  • see here

  • NOTE: you need a counter, to keep track of how many times you go through the loop

• go over while loops:

  • javascript

Activity

• nil

Daily Assignment

• did you know:

  • early computers did not have processors that could multiply, only add and subtract so programmers had to write a program to do multiplication Eventually chips did have hardware multipliers.

  • fortunately, from math class you know that multiplication is just repeated addition

    • ex. 6x3 means add 6 three times or 6+6+6

• create a program, using a while loop, that:

  • lets the user enter in a simple positive integer multiplication question

  • you program performs the multiplication ONLY using addition and loops

• BONUS:

  • once you have solved it for positive numbers, let the user enter negative numbers

  • what do you need to change?

Extra

• do the above program in PHP