# Beginner – 03 Conditions – If Then Else

• An if statement do one thing if a compare is true another if it is false..
```--remember to add two == if you want to compare
-- "==" is exactly the same
-- a > b --is a bigger than b then return true else false
-- a < b --is a smaller then b then return true else false
-- a != b --if a is NOT equal to b then return true else false

-- So if the compare returns true run the script
-- inside the parentheses else not at all...

--

a = 5
b = 5

if a == b then (
print "a and b are the same"
)

-- often you want to do one thing if it is true
-- and another if it is false

a = 5
b = 6

if a == b then (
print "a and b are the same"
) else (
print "a and b are not the same"
)```

• When you want to choose certain objects. Say I want all boxes that has a height over 100.0 units. Or Want to change all lights that has a intensity of 50 but not anything else. You can use the IF THEN command
```--First create an array of all boxes in the scene

myBoxes = \$Box*

--this is a rather unsafe way since it selects all
--objects based on their name.. so if you have a
--sphere that someone named "BoxXyz" it will also
--be included.. and then it does not have a height
--property

--A safer way to select is
--make sure it is a box we are selecting.

--You can get the type of class an object is..
ClassOf \$ --this gets the class of the selected object..

--This collects all objects that is of classOf box
myBoxes = for item in objects where (classOf item == Box) collect item

--Ok now we got an array with just objects
--that inherits from the class Box

--Lets create a for each loop that
--prints out if the value is below 50 or above..

for b in myBoxes do (
if b.height > 50.0 then (
print (b.name + " is soo very high")
) else (
print (b.name + " is feeling low")
)
)```