Scratch

Easy functions

Abs = Absolute Value
10^ = 10 to the power of #

These are much harder math functions used in about high school math and up.

Tan = Tangent
Sin = Sine
Cos = Cosine
Log = logarithm

I have NEVER gotten the point of absolute value. Why not just write seven or something. Wait...

Well,
-abs turns positive numbers to positive numbers, but negative numbers to positive numbers
-sqrt is the square root of the number. like 4 is 2 because 2x2=4, 49 is 7 because 7x7=49, so the number that you multiply to itself to get your number.
-sin and cos, sine and cosine, I'd use this to explain. Start a new project, and make two variables called "sine of direction" and "cosine of direction" with using the scratch cat.Add this script:
[blocks]
<when green flag clicked>
<forever>
<point towards( mouse
<set{   sine of direction   }to( sine of direction
<set{   cosine of direction   }to( cosine of direction
<end>

Also make sure you can see the value of the variable on the screen. Then click the green flag and move your mouse around and you'll notice that if the cat is pointing closer to the right the sine will be closer to 1, if its closer to the left it will be closer to -1 and with cosine its just with up and down. Add this in the forever loop and look at what happens:

<if><mouse down?>
<change x by(  sine of direction
<change y by(   cosine of direction
<end>

hope that helps.

Hobbs1100  wrote:

Oh well. Next year, in Grade 7, I might learn some of that. I already know Power of and absoloute value.

I'm in 7th grade and we haven't learned any of the operations like these <abs( I don't even know what "power of and absoloute value" are.

Wait. Does he mean power of as in exponents? If so I know what he means. I learned it in 5th grade. Sometimes I feel like my school has the worst curriculums. I'm still learning stuff that I learned in 5th grade. It's so boring.

Zelda123 wrote:

Yes, 2 to the 5th power is the same as 2^5.

Oh. I never knew about the ^ thing

I learned it as 2 with a little 5 in the corner.