CodeKaroYaaro PPT python part-(1)
                     PYTHON PROGRAMMING 
(PART-1)
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What is python programming?
Python is  an  interpreted,  object-oriented,  high-
level programming language with  dynamic 
semantics. 
Python's simple,  easy  to  learn  syntax  emphasizes 
readability  and  therefore  reduces  the  cost 
of program maintenance. 
Python supports  modules  and  packages,  which 
encourages program modularity and code reuse.
 Define Algorithm
Algorithm : It is a sequence of instructions designed in such a way that if the instructions 
are executed in the specified sequence, the desired results will be obtained. The 
instructions in an algorithm should not be repeated infinitely. The algorithm should be 
written in sequence.
 What are the properties of algorithm?
• It is written in simple English. 
•  Each step of an algorithm is unique and should be self
ALGORITHM •  explanatory. An algorithm must have at least one input. •  An algorithm must have at least one 
•  output. An algorithm has finite number of steps.
 What are the building block of algorithm?
The three building block of algorithm are :
• Sequence 
• Selection 
• Iteration
 Sequence:
A  sequence  is  one  of  the  basic  logic  structures  in  computer 
programming. In a sequence structure, an action, or event, leads 
to the next ordered action in a predetermined order.
WHAT IS 
 Selection: MEANT BY 
A  selection  (also  called  a  decision)  is  also  one  of  the  basic  SELECTION, 
logic  structures  in  computer  programming.  In  a  selection 
structure, a question is asked, and depending on the answer,  ITERATION 
the  program  takes  one  of  two  courses  of  action,  after which 
the program moves on to the next event. AND 
SEQUENCE 
 Iteration: CONTROL 
Iteration is the repetition of a process in order to generate an 
outcome.  The  sequence  will  approach  some  end  point  or  STRUCTURES? 
end  value.  Each  repetition  of  the  process  is  a  single 
iteration,  and  the  outcome  of  each  iteration  is  then  the 
starting point of the next iteration.
DEFINE FLOWCHART:
It is a pictorial representation of an algorithm. The flowchart uses different shape symbols to 
denote the different appropriate instructions and these instructions can be written within the 
boxes using clear statements.
Write the Characteristics of Pseudo code:
Named variables represent data and identifiers denote higher level 
functions
Composed of a sequence of statements or steps.
• Statements are often numbered sequentially. 
• Operational (Imperative) statements include assignment, input, and 
output Control structures provide iterative and conditional execution. 
Indentations used for grouping b 
WHAT IS NEED FOR FLOWCHART SYMBOL? 
The  need  for  flowchart  symbols  because  each  symbols  of  different  shapes  denotes 
different  types  of  instructions.  The  program  logic  through  flowcharts  is  made  easier 
through the use of symbol that has standardized planning. 
Write some rules for drawing a flowchart
Flowchart rules to start following:
Run  your  return  lines  under  your flowchart,  making  sure  that  they  don't  overlap. 
Maintain consistent spacing between symbols. Use the correct symbol  for each step 
(diamond  shapes  are  for  decisions,  rectangles  are  used  for  processes,  start/end 
shapes should be the same, etc.)
WHAT ARE THE ADVANTAGES OF USING A FLOWCHART
• Communication 
•  Effective 
•  Proper 
•  Documentation 
•  Efficient Coding 
•  Proper 
•  Debugging 
•  Efficient Program Maintenance 
Write any two disadvantages of flowchart ?
• It is not visual 
•  We do not get a picture of the design.
WHAT IS PSEUDO CODE? 
Pseudo means imitation of false and code refers to the instruction written in a 
programming language. Pseudo code is programming analysis tool that is used for 
planning program logic. 
Write the Characteristics of Pseudocode.
• Named variables represent data and identifiers denote higher level 
•  functions. 
•  Composed of a sequence of statements or steps. 
• Statements are often numbered sequentially. 
•  Operational (Imperative) statements include assignment, input, and 
•  output. 
•  Control structures provide iterative and conditional execution. 
• Indentations used for grouping blocks of statement
WHAT ARE THE RULES FOR WRITING PSEUDO CODE? 
• Write one statement 
•  per line. Capitalize 
•  initial keywords. 
•  Indent to show hierarchy. 
•  End multiline structure. 
• Keep statements language independent.
Write any two advantages of pseudo code.
It can be done easily in any word processor. 
•  It can be written easily. 
• It can be easily modified as compared to flowchart. 
Write any two disadvantages of flowchart?
•  It is not visual 
•  We do not get a picture of the design.
DIFFERENTIATE ALGORITHM AND PSEUDO CODE
S.NO Algorithm Pseudo code
1. It is a well-defined procedure that It is a simple way of writing programming code
allows a computer to solve a problem. in English.
2. Algorithms can be described in Pseudo code describes how you would 
various ways, from pure implement an algorithm without getting 
mathematical formulas to complex into syntactical details.
graphs.
WHAT IS THE DIFFERENCE BETWEEN ALGORITHM AND 
FLOWCHART
S.NO Algorithm Flow Chart
1. Step by Step formation Box by box formation 
2. Mostly run to complete or manage a  Can be used in general terms to solve 
program implementation any problem related to an individual or 
a group.
3. More detailed but difficult to Less detailed but easy to understand by 
understand everyone.
1. Define algorithm. Explain in detail about the building blocks of 
algorithm.
2.  What is flowchart. Explain the Basic design structures in Flowchart 
3. What is pseudo code? Explain its guidelines and benefits. 
4.  Explain the design structures in pseudo code. 
5. Explain the steps involved in program development cycle. 
6. Wari.teF itnhde  malignoimrituhm i,n p ase luisdt.o code and draw the flowchart for the 
fobll.owIninsegr:t a card in a list of 
sorted cards. 
c. Guess an integer number in a 
range. 
d. Towers of Hanoi.
     
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