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Concatenate through placement

Figure 10 . Concatenate through placement.
>>>print("Dick"'Baldwin') DickBaldwin>>>print('Joe' "Smith") JoeSmith>>>

Note that you can mix the different quote types. Also, it doesn't matter if there is whitespace in between. The whitespace doesn't carry through to theoutput.

Creating whitespace

If you want any space between the substrings in the output, you must include that space inside the quotes that delimit the individual strings asshown in Figure 11 .

Figure 11 . Creating whitespace.
>>>x = "Richard ">>>y = " Baldwin">>>print(x + "G." + y) Richard G. Baldwin>>>

Using + for concatenation

The plus operator (+) can be used to concatenate strings as also illustrated in Figure 11 .

This fragment assigns string literal values to two variables, and then uses the plus operator to concatenate the contents of those variables with anotherstring literal.

Of course, it could also have been used to concatenate the contents of the two variables without the string literal in between.

Whitespace is included in the quotes

Note that the string literals in Figure 11 contain space characters. There is a space after the d in my first name and before the B in my last name. That is what Imeant earlier when I said that if you want any space between the substrings in the output, you must include that space inside the quotes

Visualizing string concatenation

Figure 12 illustrates string concatenation through the use of the code visualizer that you learned about in an earlier module.

Figure 12. Visualizing string concatenation.

missing image

The code in the code block in Figure 12 is similar to the code in Figure 10 and to the use of "+" operator for string concatenation. The diagram on the right shows how the concatenationof strings produces objects on the heap containing the concatenated strings.

The variable named var1 points to an object of type str containing a string that was produced by concatenating two literal strings through placement .

Similarly, the variable named var2 points to a different object of type str containing a string that was produced by concatenating two different literal strings through placement .

The variable named var3 points to a third object of type str containing a string that was produced by using the "+" operator to concatenate the contents of two existing objects of type str . Although it might not be obvious at this point in the course, it is important to note that the contentsof the third object contains the concatenation of copies of the contents of the first two objects. In particular, it doesn't simply contain pointers to theother two objects.

More on strings later

I will have more to say about strings in a future module. Before that, however, we need to learn how to create and execute script files, and we also need tolearn a little more about Python syntax.

Miscellaneous

This section contains a variety of miscellaneous information.

Housekeeping material
  • Module name: Itse1359-1040-Strings Part 1
  • File: Itse1359-1040.htm
  • Published: 10/14/14
  • Revised: 01/31/16
Disclaimers:

Financial : Although the Connexions site makes it possible for you to download a PDF file for thismodule at no charge, and also makes it possible for you to purchase a pre-printed version of the PDF file, you should beaware that some of the HTML elements in this module may not translate well into PDF.

I also want you to know that, I receive no financial compensation from the Connexions website even if you purchase the PDF version of the module.

In the past, unknown individuals have copied my modules from cnx.org, converted them to Kindle books, and placed them for sale on Amazon.com showing me as the author. Ineither receive compensation for those sales nor do I know who does receive compensation. If you purchase such a book, please beaware that it is a copy of a module that is freely available on cnx.org and that it was made and published withoutmy prior knowledge.

Affiliation : I am a professor of Computer Information Technology at Austin Community College in Austin, TX.

-end-

Questions & Answers

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
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Adin
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Adin
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Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
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characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
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Source:  OpenStax, Itse 1359 introduction to scripting languages: python. OpenStax CNX. Jan 22, 2016 Download for free at https://legacy.cnx.org/content/col11713/1.32
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