Open up IDLE (look at #0). You'll notice that the lines you type on start with ">>>". That's normal. You'll also notice that I'll start things I want you to type with ">>>" also. That's also normal. You should not, however, type extra ">>>". That's not normal. The line after the ">>>" is the output line. That's also normal. You'll also notice that I say also too much. That's also not normal.
Now some math! Type:
>>> 1 + 1 2
Yay! Math! See? Easy stuff. Now try:
>>> 1 - 1 0
And it works like that with all the numbers too!
>>> 3 + 5 - 10 -2
Ooooo look! It's a negative two!
Now a variable!
>>> red = 3
We call that "assigning 3 to red." You may have noticed that it didn't have any output. That's because the number 3 went into the variable red. Now if we type:
>>> red 3
There's our 3!
We can also do:
>>> blue = 5 - 10 >>> blue -5
There, we totally subtracted 10 from 5, then assigned that (-5) to blue!
Now I'm going to be crazy and try something:
>>> red + blue -2
NO WAY!! I totally just blew my own mind right there. I added red and blue and got a number!!! It took the value of red (3) and the value of blue (-5) and added them! That's some sweet skills right there.
No comments:
Post a Comment