So far everything we have done has been basic sequencing. What I mean is, 1 line of code is decoded and then the next and then the next.

We need computers to be able to make decisions based on the criteria we give them. This is paramount to everything computing. eg.

• A fire alarm going off IF smoke is detected
• A notification pinging IF you get a message
• and the list could go on

How it works

if something is True
		execute some code
else
		execute some other code 

<aside> 💡 Remember how before everything in Computing evaluates to True or False?

</aside>

Comparative Operators

Example comparisons

You may remember seeing these Boolean expressions on the 3 - Math page

4 == 2+2 → True

10 > 2+2 → True

2 != 1+1+1 → True

5 < 0 → False

2 == 1+1+1 → False

12 <= 7+7 → True

If statement example

https://replit.com/@bitFez/ex15#main.py

This example compares 2 objects. water_temp and 100. They are both integers.

When the If statement compares the value of water_temp (which is 70) with the value 100, it checks to see if it is True that 70 is less than 100. 💡 Remember this is a Boolean expression.

Anatomy of an If statement

https://youtube.com/shorts/ux241ATdK5Q?si=Mk7yOzMLv0No-plL

Tasks

<aside> 😑 Don’t think about skipping this part. This is tedious but you need to practice to get good and build muscle memory. Do each exercise below, typing each one out diligently 😊

</aside>

• [ ] First set of tasks if_task1 - Replit

• [ ] the second set of tasks https://replit.com/@bitFez/iftask2

• [ ] third task (see below)

  # Go back to task 2 add a variable called threes_total like below
  threes_total = 0
  
  # now each time a number is a multiple of 3 add the number to the threes_total
  # eg
  if num % 3:
  		# whatever you were going to print & add this below
  		threes_total equals threes_total plus num
  
  # finally check if three_total is a multiple of 3 in an if statement
  

Extra tasks