Python:Control Flow Statements in Python

Control Flow Statements/ Flow Control Statements:

• Generally Python program execution starts from the first line and ends with last line.

• In C,C++,Java,.Net program execution starts from  main( ) method.

• By default each statements in the Python program will be executed only once.

• In order to skip the execution of some statements or in order to execute the some statements repeatedly use the flow control statements in python.

Elements of Flow-Control: 

In flow control statements w can use the two elements,they are

• Condition

• Block / Clause

Condition:

Any expression which result is Boolean value is known as a condition.

example:                   >>> 3>5

                                   False

                                  >>> 5<8

                                 True

Block/Clause:

The set of statements which are following same space Indentation.

• Blocks begins with by increasing indentation.

• Blocks can contains some other blocks.

• Blocks ends with by decreasing indentation to zero(0) to appending (containing) block indentation.

• Python program by default itself one block.

• Python supports nested blocks.

Blocking Concept:

Here executing is very easy when compared to  curly brace concept.

Flow control statements are categorized in to two types, they are.

• Conditional statements

• Looping statements