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It also causes a reference to the new object to be stored in the variable named b , replacing the reference to a different object that was previously stored there.

You will be learning a lot more about objects as well as the code visualizer tool in future modules.

Type considerations

In most modern programming systems, values having fractional parts, such as 3.14159 are commonly referred to as floating point types. (This terminology comes from the fact that the decimal point can float back and forthfrom left to right.)

Similarly, whole number values are commonly referred to as integer types. (These are values with no decimal parts, such as, "I have 3 whole apples.")

Advantages and disadvantages

Each type has advantages and disadvantages relative to the other when performing computations.

The range of values

For example, in some systems, the total range of values for a particular integer type is restricted to the set of whole numbers between -32768 and +32767. Anythingoutside that range cannot be handled as a whole number of that integer type.

Although the range of an integer type will be different on different systems, it will almost always be less than the range of a floating point type on thesame system.

Speed

On some systems integer arithmetic is performed much faster than floating point arithmetic. On those systems, if speed is important, usingintegers may be more attractive than using floating point types.

Floating point provides greater range

On most systems, the floating point type provides a much greater range in terms of the values that can be maintained and used for arithmetic. For example,a particular system might be capable of representing the following two values as well as millions of values in between:

  • 0.000000000033333
  • 333330000000000.0

Sometimes range is important, and sometimes not

Sometimes range is important, and sometimes it isn't. However, as I mentioned above, in some systems this greater range is obtained at some sacrifice inarithmetic speed relative to integer types.

Approximate results

Also, as I will explain in the Review module that goes with this module, floating pointarithmetic often produces approximate results instead of exact results.

While approximate results might be OK for some scientific calculations, they might not be OK for other calculations such as financial calculations for example.

Automatic type handling in Python

In strongly-typed languages such as Java, it is the responsibility of the programmer to make certain that types are handled correctly. For example, itis often not possible to store a floating point value into a variable previously declared to be for the storage of integer values. There is a very strongpossibility that it simply won't fit.

Python takes care of routine type issues automatically

Consider the interactive code fragment shown in Figure 5 . The variables x and y are originally created to store integers and are populated with thevalues 5 and 6 respectively. The variables are added and the correct sum is displayed as output from the interpreter.

Questions & Answers

Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
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
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
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
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
hi
Loga
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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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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