VARIABLES IN PYTHON | COMPONENTS OF VARIABLES

VARIABLES IN PYTHON | COMPONENTS OF VARIABLES

A variable is like a container that stores value that you can access or change. A variable as the name suggest, has been derived from the word  "vary"  which states that the variable may vary  during the execution of a program i.e. , the value of a variable keep changing during the program execution.

In Python, every element is termed as an object. Hence,  a variable is also an object in Python.

Note-: VARIABLES provider way to associate names with object.

Through variables we can store the value in computer's memory . Variable is a named unit of storage. A program manipulates its value. Every variable has a type and this type defines the format and behavior of the variable.

For example, if we write
x = 3
It will automatically assign a value 3 to the variable named x
Similarly, if you type
x=10
Then automatically it will assign 10 to the variable named x 



The above behavior exhibit that variable x has been given a value 10, which is stored inside a memory location with the name x. This is statement showing store 10 in X but does not get displayed until and unless we type x (>>>x) .

 

Let us take the another example working with the variables.

After executing the above lines of the code, x is 4, y is 5 and z is 8.

Alternatively we can type this program in script mode also, but for displaying the values of variables x , y and z, we need to give a print() statement explitily. print() statement is used to display the value assigned to a variable. 

The print statement can print multiple values on a single line. The, (,) separates the list of values and variables that are printed.

 

Now, save the code with table filename with extension .py then run it ( RUN MY F5).

OUTPUT-:

Let's understand this code line by line :

• x start with value 3 and y start with value 4.
• In line 3, a variable z  is created and equals x + y, which is 7.
• Then the value of z is changed to equal one more than it currently equals, changing it from 7 to 8.
• Next, x is changed to the current value of y, which is 4.
• Finally, y is changed to 5. Note that in this does not affect x.
• So in the end, x is 4, y is 5 and z is 8.

 

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