Hello World!
I'm talking about Boolean expressions in Alice3.
I'm going to work with AND, &&, this time.
I'd like to get somebody's age
and figure out if they are a teenager or not.
(I'm going to make this a little bit smaller.)
I need a variable to store the age, that's going to be an integer.
Let's call it age and we give it some placeholder value.
and then we are going to ask the user,
You can't mix apples and oranges,  age is an integer.
We need to use the function to get to an integer from the user.
We just drop that to replace that integer placeholder value.
The custom text string is the prompt: "How old are you?"
For my if statement, I want to determine if the person is a teenager.
That would be anybody from 13 to 19 inclusive.
or, we could say that if somebody is older than 12 and younger than 20.
so the &&, two ampersands, is used to mean AND.
and I want
I need to just pick true and true for the two values
and then I can replace that with a comparison
and the first one is going to be
age is greater than or equal to:  >=
and then pick custom whole number for my second value
and put in 13.
So the first condition is the age is greater than or equal to 13: age>=13
The second condition is going to be that age is less than or equal to 19: age <=19
so I'm picking age for my first value
are you and custom whole number 19.
Say okay.  So, if  age is greater than or equal to 13
AND age is less than or equal  to 19:  && age<=19
The hare is going to say
"Oh, you're a teenager."
and I don't have to have him say something else but let's do that.
"You aren't a teenager."
When we run, I would this like to test some numbers
I want to test 13 and 19.
I would like to test something like 12, where this is false.
and I would like to test something like 20,
and I really ought to just test something in between, like  15 or 16.
So let's run it and put in 12, and he says " "You aren't a teenager."
and let's test it with 13 and he says "Oh, you're a teenager."
and let's tested it with 19, he says "Oh, you're a teenager."
and let's test  it with 20 and he says "Oh, you're a teenager."
And that's it!