Unit #5-01

Learning Outcome

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

• understand and use an if statement

Review

• debugging and breakpoints in Chrome inspector

Lesson

• all our programs so far have been linear

  • go over linear flow-charts

• go over "Boolean Expression" and "If ... Then"

  • https://www.w3schools.com/js/js_booleans.asp 

  • https://www.w3schools.com/js/js_if_else.asp 

  • go over if-then flowchart

    • diamond is boolean expression

    • you MUST have a "yes" and "no"

• go over difference between "==" and "==="!

  • == → "is equals"

  • === → "is equals AND the same type"!

• go over "Random Numbers"

  • https://www.w3schools.com/js/js_random.asp 

  • Math.random()

    • // returns a random integer from 1 to 6 into variable "randomNumber"
      const randomNumber = Math.floor(Math.random() * 6) + 1

  • problem with "pseudo-random numbers" and seeds

Daily Assignment

• create a program that:

  • ensure your program has a complete GUI and follow all the steps to solve the problem

  • randomly picks a number from 1 to 6

    • do not show it to the user, just keep it in memory in a variable

  • asks the user to pick a number from 1 to 6

  • use an if ... then statement to tell them if they got it correctly

    • use a 2nd if ... then to tell them is they got it wrong!

  • you should place the "random number generation" outside of the function call, so it is run once (1) when the webpage first loads and then does not change; so it is easier to guess!

Extra

• do the above program in PHP

• random integers in PHP