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With some exceptions, items that appear in the argument list surrounded by matching quotation marks (strings) will be displayed in the browser window.

The exceptions include the second item in the above list . This item is a special command to the browser, commonly known as a break tag. The occurrence of a break tag tells the browser to go down to the next line before displaying any additional material.

Such browser commands usually begin with a left angle bracket as shown in Listing 1 . Because of this, it is usually wise to avoid displaying strings that begin with left angle brackets unless you know for sure that your string won'tbe interpreted as a command to the browser.

Displaying material other than strings

I will show you how to display material other than strings in a later section titled The string concatenation operator . Before getting into that, however, I will discuss several other topics.

Structured programming

When a student enrolls in the Object-Oriented Programming course that I teach at my college, I expect that student to have knowledge of something calledstructured programming, which is generally defined as including the following topics:

  1. Functions with parameter passing
  2. Sequence
  3. Selection (if-else)
  4. Repetition (for, while, and do-while loops)

I also expect them to know how to use variables and how to use operators (add, subtract, multiply, divide, etc.).

You will need to have an introductory knowledge of these topics to understand the JavaScript scripts that I will use to explain physics concepts in latermodules. I will briefly explain these topics in this module and will discuss them further in later modules where they are used.

Functions

Functions, or procedures as they are called in some languages, provide a fundamental building block for virtually every programming language. The purposeof a function is to encapsulate the ability to perform a task into a single set of code and to be able to execute that code from a variety ofdifferent locations within the script. This can eliminate the requirement to repeat the same code over and over when the same task is required at multiplepoints in the script.

The surface area of a sphere

For example, if you write a script that frequently needs to calculate the surface area of a sphere, you can encapsulate those calculations in a function.Then, whenever your script needs to know the surface area of a sphere, it can simply call the function and provide the radius of the sphere as a parameter.The function will perform the calculation and return the answer to be used by the script at that point.

A JavaScript function definition

A JavaScript function definition has the following basic parts as shown in Listing 2 :

  1. The function keyword.
  2. The function name.
  3. A comma-separated list of arguments enclosed in parentheses. (If there are no arguments, which is perfectly legal, theparentheses must still follow the function name but they will be empty.)
  4. The statements in the body of the function enclosed in curly brackets.

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
what are the products of Nano chemistry?
Maira Reply
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
Google
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
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
ya I also want to know the raman spectra
Bhagvanji
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
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
Brian Reply
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?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
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 ?
Bob Reply
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?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
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
Smarajit Reply
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Source:  OpenStax, Accessible physics concepts for blind students. OpenStax CNX. Oct 02, 2015 Download for free at https://legacy.cnx.org/content/col11294/1.36
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