Types of Variables, Assigning, declaring and deleting variables.

Types of variables

There are two types of variables in python  local and global variables.

•     In Python, global variable is a variable declared outside of the function or in global scope.

•    global variable can be accessed inside or outside of the scope  function

Local variables

Local variables are the variables that are used with in a function or method.

Global variables

Global variables are used when we use the variable in the entire program.

Assigning values to variables

•  Python allows us to assign values to the variables.

• Lets assume the value 5 is assigned to the variable ‘a’

Multiple assignment

• In multiple assignment , multiple variables are assigned with multiple values.

Example

Declaring and re-declaring the variables.

•  Lets first see how to declare a variable. Its that simple that assigning variable a value to hold.

Example

>>> a=9

>>> print(a)

9

Now we re declare the variable.

   a=9

print(a)

a= 33

print(a)

output:

33

Here the output gives the re assigned value instead of first value. This means that the first value is replaced by second  value.

Deleting the variable

• In python you can delete the variable that you  previously assigned  the value using del command.

Example

a=7

print(a)

del a

print(a)