Python Control Structures
-----------------------
-change the order of execution
-flow the control of execution(ignore or skip, repeate)
1. Conditional statements (if)  - not support switch
2. unconditional statements (break,continue,pass) not support goto
3. looping statements : iteration or repeative statement (for,while)   not support do while

1. Python conditional statements:
----------------------------
-control can be transfer into one place to another place with using condition

Python If Statements
-------------------
-check the given input is correct(true) or not(false)

There are various types of if statements in Python.

1. if statement
2. if-else statement
3. nested if statement
4. elseif statements

1. if statements
---------------
  -true part only
Syntax:
-------
  if(condition): 
     statements
-----------------------------   
2. if...else statements
-----------------------
-true and false
-only one condition
Syntax:
------
  if(condition): 
    statements
  else:
    statements
----------------------------
working:
----------
 -First test condition is evaluated
 -if the given condition is true than execute the true part statements
 -otherwise execute the else part statement

3. else if statements
---------------------
-more than one condition
Syntax:
------
  if(condition): 
     statements
  elif(cond):
     statements
  elif(cond):
     statements
  ....
  ....
  else: 
     statements
   
4. Nested if statements
------------------------
Syntax:
-------
  if (condition):
     if (condition):
         statements
     else: 
         statements
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