# 1.4 Scr0340: arithmetic operators in scratch 2.0  (Page 6/7)

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## More blocks of the correct shape

Before leaving the discussion of the left panel in Image 3 , I will explain the behavior of four additional blocks that are of the correct shape forbeing dropped into the white boxes in the blocks in the rightmost panel. (The remaining blocks beyond those four deal with strings, which I will ignore for now.)

## Random numbers

The block labeled pick random 1 to 10 lets you enter other values in place of 1 and 10. Then this block will deliver a random number withinthat range when it is called upon to do so. Random numbers are often used in game programs to simulate the throwing of dice or the spinning of a wheel of fortune.

## The modulus

The block labeled mod will produce the modulus of two values when called upon to do so. The modulus of two numbers is the remainder thatresults from dividing one number by another number. You may remember the remainder from when you learned to do long division in elementary school butbefore you learned about decimals.

## Various numeric representations

The block labeled sqrt will deliver about a dozen different representations of numeric values, depending on what is selected from thepull-down list. This includes the square root, trigonometric functions, absolute value, etc.

## Rounding a number

Finally, the block labeled round will round a decimal number to the nearest whole number.

## Drag and drop the plus and minus operators

Image 4 shows the result of dragging the top two green blocks from the Operators toolbox and dropping them into the white boxes in the bottom two orange variable blocks in the rightmost panel of Image 3 .

## A few more steps are required

If you compare Image 4 with Image 2 , you will see that Image 4 is close to what we need but we aren't quite there yet. In order to causethe bottom two blocks in the rightmost panel in Image 4 to match the bottom two blocks in Image 2 , we need to do the following:

• Click the orange Data button in the upper left of Image 4 to expose the variables as shown in Image 1 .
• Drag the blocks for the variables named LeftOperand and RightOperand from the Data toolbox and drop them into the white boxes in the bottom two blocks in Image 4 to make them match the bottom two blocks in Image 2 .

That's the solution. The upper left portion of your Stage area should now look similar to Image 5 . Note however that you may need to use the mouse to arrange the four variables and the button to get your Stage arrangedlike Image 5 .

## Operation of the program

Once you reach this point, you can click the green flag to initialize all four variables to zero.

Then you can move the sliders back and forth to manually set the values for the variables named LeftOperand and RightOperand .

If you click immediately to the right or left of the thumb on a slider, that will cause the thumb to move a small distance in that direction.

where we get a research paper on Nano chemistry....?
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
what are the products of Nano chemistry?
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
ya I also want to know the raman spectra
Bhagvanji
I only see partial conversation and what's the question here!
what about nanotechnology for water purification
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
why we need to study biomolecules, molecular biology in nanotechnology?
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
why?
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
how did you get the value of 2000N.What calculations are needed to arrive at it
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