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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.


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

find the 15th term of the geometric sequince whose first is 18 and last term of 387
Jerwin Reply
The given of f(x=x-2. then what is the value of this f(3) 5f(x+1)
virgelyn Reply
hmm well what is the answer
how do they get the third part x = (32)5/4
kinnecy Reply
can someone help me with some logarithmic and exponential equations.
Jeffrey Reply
sure. what is your question?
okay, so you have 6 raised to the power of 2. what is that part of your answer
I don't understand what the A with approx sign and the boxed x mean
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
I'm not sure why it wrote it the other way
I got X =-6
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
oops. ignore that.
so you not have an equal sign anywhere in the original equation?
is it a question of log
Commplementary angles
Idrissa Reply
im all ears I need to learn
right! what he said ⤴⤴⤴
what is a good calculator for all algebra; would a Casio fx 260 work with all algebra equations? please name the cheapest, thanks.
Kevin Reply
a perfect square v²+2v+_
Dearan Reply
kkk nice
Abdirahman Reply
algebra 2 Inequalities:If equation 2 = 0 it is an open set?
Kim Reply
or infinite solutions?
The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
Embra Reply
if |A| not equal to 0 and order of A is n prove that adj (adj A = |A|
Nancy Reply
rolling four fair dice and getting an even number an all four dice
ramon Reply
Kristine 2*2*2=8
Bridget Reply
Differences Between Laspeyres and Paasche Indices
Emedobi Reply
No. 7x -4y is simplified from 4x + (3y + 3x) -7y
Mary Reply
how do you translate this in Algebraic Expressions
linda Reply
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
Chris Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
many many of nanotubes
what is the k.e before it land
what is the function of carbon nanotubes?
I'm interested in nanotube
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
what is system testing
what is the application of nanotechnology?
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
anybody can imagine what will be happen after 100 years from now in nano tech world
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
silver nanoparticles could handle the job?
not now but maybe in future only AgNP maybe any other nanomaterials
I'm interested in Nanotube
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
bamidele Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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