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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.


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

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.


Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
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..
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
ya I also want to know the raman spectra
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.
yes that's correct
I think
Nasa has use it in the 60's, copper as water purification in the moon travel.
nanocopper obvius
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
scanning tunneling microscope
how nano science is used for hydrophobicity
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
what is differents between GO and RGO?
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
analytical skills graphene is prepared to kill any type viruses .
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
The nanotechnology is as new science, to scale nanometric
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
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
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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