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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

what is variations in raman spectra for nanomaterials
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I only see partial conversation and what's the question here!
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RAW Reply
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Damian
yes that's correct
Professor
I think
Professor
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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
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LITNING
scanning tunneling microscope
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Rafiq
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
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?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
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biomolecules are e building blocks of every organics and inorganic materials.
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research.net
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Introduction about quantum dots in nanotechnology
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nano basically means 10^(-9). nanometer is a unit to measure length.
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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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