The document serves as an introduction to programming, emphasizing decision-making statements in Python. It outlines key concepts such as the basics of programming, the functionality of Python, and specific conditional statements like 'if', 'if-else', and 'if-elif'. The material also highlights the significance of these statements in automating tasks and aiding business decisions.

1. Introduction to Programming
and
Decision-Making Statements
in Python

2. CONTENTS
oBasics of Programming
oIntroduction to Python
oDecision Making
oDecision Making statements in Python
oSummary and Take aways
oReferences
2

3. Learning Objectives
1. Introduce programming and use cases in business technology domain.
2. Understand the the different decision making statements and its flow of logic.
3. Demonstrate examples on decision making statements in Python.
3

4. Basics of Programming
❑ A process of performing computational tasks to solve problems.
❑ Its not a herculean task !
❑ Myth: Programming is only for Computer Engineers!
❑ Bit of syntax and bit of logic
❑ Programming Language: A set of rules/syntax helps you to solve a problem with a logic!
Any examples?
C, C++, Java, Python etc.
4

5. 5

6. Introduction to Python
It is used for:
• web development
• software development,
• solving mathematical problems,
• business analytics problems
Why Python?
• Python works on different platforms (Windows, Mac, Linux, etc).
• Python has a simple syntax similar to the English language.
• Python has syntax that allows to write programs with fewer lines than some other programming
languages.
• Python runs on an interpreter system, meaning that code can be executed as soon as it is written.
6

7. Introduction to Python
Python 3 – current version
Where you write python programs?
→Any text editors or any IDE
→Save file as <filename>.py
7

8. If you want to display something on your screen,
print("Hello, World!") ➔ Hello, World!
(remember the quotes “ ” when you pass strings/text)
a = 100
print(a)
➔ ?
print("a") ➔ a
8
Introduction to Python

9. Decision Making
There comes a point in your life where you need to decide what steps should be
taken and based on that you decide your next decisions.
Any examples?
In programming, we often have this similar situation where we need to decide which
block of code should be executed based on a condition.
Example: Movements of Mario
9

10. Decision making statements in Python
▪ if statements
▪ if-else statements
▪ if-elif ladder
10

11. if statement
• Most simple form of decision-making statement.
• It takes an expression and checks if the expression evaluates to True then the
block of code (body) in if statement will be executed.
• If the expression evaluates to False, then the block of code is skipped.
if (expression):
Statement body
Statement z
11
a=20
if (a = 20):
print (a)
print (“end”)
Output
20
expression
body
Indenting the
body is
mandatory!

12. Example program
a = 20 ; b = 20
if ( a == b ):
print( “a and b are equal”)
print(“If block ended”)
Output
a and b are equal
If block ended
12

13. Allowable Relational Operators for Boolean Expressions
if (operand relational operator operand) then
Ex: if (a == b)
Python Mathematical
operator equivalent Meaning Example
< < Less than 5 < 3
> > Greater than 5 > 3
== = Equal to 5 == 3
<= ≤ Less than or equal to 5 <= 5
>= ≥ Greater than or equal to 5 >= 4
!= ≠ Not equal to 5 != 5

14. if-else statement
• checks the expression and executes the if block when the expression is True
otherwise it will execute the else block of code.
if (expression):
Statement
else:
Statement
14
Program
weather = "rainy"
if (weather == "sunny"):
print("It's a beautiful day! I will go outside.")
else:
print("It's not sunny today. I will stay indoors.")
Output
It's not sunny today. I will stay indoors.

15. Example program
number1 = 20 ; number2 = 30
if( number1 >= number2 ):
print(“number 1 is greater than number 2”)
else:
print(“number 2 is greater than number 1”)
Output
number 2 is greater than number 1
15
1
2
3

16. if-elif ladder
• elif keyword to chain multiple conditions one after another.
• helps to check multiple expressions and it executes the code as soon as one of the conditions evaluates
to True.
if( expression1 ):
statement
elif (expression2 ) :
statement
elif(expression3 ):
statement
.
.
else:
statement
16

17. Example program
score = 85
if score >= 90:
grade = "A"
elif score >= 80:
grade = "B"
elif score >= 70:
grade = "C"
else:
grade = "F"
print("The student's grade is:", grade)
Output
The student’s grade is: B
17

18. Summary and Key Takeaways
• Decision-making with conditional statements is a fundamental programming
concept.
• "if," "if-else," and "if-elif-else" statements enable different decision paths in
programs.
• Conditional statements are powerful tools for automating tasks and making
informed business decisions.
18

20. INTRODUCTION TO
PROGRAMMING
AND
DECISION-MAKING
STATEMENTS
IN PYTHON

21. CONTENTS
oBasics of Programming
oIntroduction to Python
oDecision Making
oDecision Making statements in Python
oSummary and Take aways
oReferences
21

22. LEARNING OBJECTIVES
1. Introduce programming and use cases in business technology domain.
2. Understand the the different decision making statements and its flow of logic.
3. Demonstrate examples on decision making statements in Python.
22

23. BASICS OF PROGRAMMING
❑ A process of performing computational tasks to solve problems.
❑ Its not a herculean task !
❑ Myth: Programming is only for Computer Engineers!
❑ Bit of syntax and bit of logic
❑ Programming Language: A set of rules/syntax helps you to solve a problem with a logic!
Any examples?
C, C++, Java, Python etc.
23

24. 24

25. INTRODUCTION TO PYTHON
It is used for:
• web development
• software development,
• solving mathematical problems,
• business analytics problems
Why Python?
• Python works on different platforms (Windows, Mac, Linux, etc).
• Python has a simple syntax similar to the English language.
• Python has syntax that allows to write programs with fewer lines than some other programming languages.
• Python runs on an interpreter system, meaning that code can be executed as soon as it is written.
25

26. INTRODUCTION TO PYTHON
Python 3 – current version
Where you write python programs?
→Any text editors or any IDE
→Save file as <filename>.py
26

27. If you want to display something on your screen,
print("Hello, World!") ➔ Hello, World!
(remember the quotes “ ” when you pass strings/text)
a = 100
print(a)
➔ ?
print("a") ➔ a
27
INTRODUCTION TO PYTHON

28. DECISION MAKING
There comes a point in your life where you need to decide what steps should be taken
and based on that you decide your next decisions.
Any examples?
In programming, we often have this similar situation where we need to decide which
block of code should be executed based on a condition.
Example: Movements of Mario
28

29. DECISION MAKING STATEMENTS IN PYTHON
▪ if statements
▪ if-else statements
▪ if-elif ladder
29

30. IF STATEMENT
• Most simple form of decision-making statement.
• It takes an expression and checks if the expression evaluates to True then the
block of code (body) in if statement will be executed.
• If the expression evaluates to False, then the block of code is skipped.
if (expression):
Statement body
Statement z
30
a=20
if (a = 20):
print (a)
print (“end”)
Output
20
expression
body
Indenting the
body is
mandatory!

31. Example program
a = 20 ; b = 20
if ( a == b ):
print( “a and b are equal”)
print(“If block ended”)
Output
a and b are equal
If block ended
31

32. ALLOWABLE RELATIONAL OPERATORS FOR
BOOLEAN EXPRESSIONS
if (operand relational operator operand) then
Ex: if (a == b)
Python Mathematical
operator equivalent Meaning Example
< < Less than 5 < 3
> > Greater than 5 > 3
== = Equal to 5 == 3
<= ≤ Less than or equal to 5 <= 5
>= ≥ Greater than or equal to 5 >= 4
!= ≠ Not equal to 5 != 5

33. IF-ELSE STATEMENT
• checks the expression and executes the if block when the expression is True
otherwise it will execute the else block of code.
if (expression):
Statement
else:
Statement
33
Program
weather = "rainy"
if (weather == "sunny"):
print("It's a beautiful day! I will go outside.")
else:
print("It's not sunny today. I will stay indoors.")
Output
It's not sunny today. I will stay indoors.

34. Example program
number1 = 20 ; number2 = 30
if( number1 >= number2 ):
print(“number 1 is greater than number 2”)
else:
print(“number 2 is greater than number 1”)
Output
number 2 is greater than number 1
34
1
2
3

35. IF-ELIF LADDER
• elif keyword to chain multiple conditions one after another.
• helps to check multiple expressions and it executes the code as soon as one of the conditions evaluates to True.
if( expression1 ):
statement
elif (expression2 ) :
statement
elif(expression3 ):
statement
.
.
else:
statement
35

36. Example program
score = 85
if score >= 90:
grade = "A"
elif score >= 80:
grade = "B"
elif score >= 70:
grade = "C"
else:
grade = "F"
print("The student's grade is:", grade)
Output
The student’s grade is: B
36

37. SUMMARY AND KEY TAKEAWAYS
• Decision-making with conditional statements is a fundamental programming
concept.
• "if," "if-else," and "if-elif-else" statements enable different decision paths in
programs.
• Conditional statements are powerful tools for automating tasks and making
informed business decisions.
37

39. INTRODUCTION TO
PROGRAMMING
AND
DECISION-MAKING
STATEMENTS
IN PYTHON

40. CONTENTS
oBasics of Programming
oIntroduction to Python
oDecision Making
oDecision Making statements in Python
oSummary and Take aways
oReferences
40

41. LEARNING OBJECTIVES
1. Introduce programming and use cases in business technology domain.
2. Understand the the different decision making statements and its flow of logic.
3. Demonstrate examples on decision making statements in Python.
41

42. BASICS OF PROGRAMMING
❑ A process of performing computational tasks to solve problems.
❑ Its not a herculean task !
❑ Myth: Programming is only for Computer Engineers!
❑ Bit of syntax and bit of logic
❑ Programming Language: A set of rules/syntax helps you to solve a problem with a logic!
Any examples?
C, C++, Java, Python etc.
42

43. 43

44. INTRODUCTION TO PYTHON
It is used for:
• web development
• software development,
• solving mathematical problems,
• business analytics problems
Why Python?
• Python works on different platforms (Windows, Mac, Linux, etc).
• Python has a simple syntax similar to the English language.
• Python has syntax that allows to write programs with fewer lines than some other programming languages.
• Python runs on an interpreter system, meaning that code can be executed as soon as it is written.
44

45. INTRODUCTION TO PYTHON
Python 3 – current version
Where you write python programs?
→Any text editors or any IDE
→Save file as <filename>.py
45

46. If you want to display something on your screen,
print("Hello, World!") ➔ Hello, World!
(remember the quotes “ ” when you pass strings/text)
a = 100
print(a)
➔ ?
print("a") ➔ a
46
INTRODUCTION TO PYTHON

47. DECISION MAKING
There comes a point in your life where you need to decide what steps should be taken
and based on that you decide your next decisions.
Any examples?
In programming, we often have this similar situation where we need to decide which
block of code should be executed based on a condition.
Example: Movements of Mario
47

48. DECISION MAKING STATEMENTS IN PYTHON
▪ if statements
▪ if-else statements
▪ if-elif ladder
48

49. IF STATEMENT
• Most simple form of decision-making statement.
• It takes an expression and checks if the expression evaluates to True then the
block of code (body) in if statement will be executed.
• If the expression evaluates to False, then the block of code is skipped.
if (expression):
Statement body
Statement z
49
a=20
if (a = 20):
print (a)
print (“end”)
Output
20
expression
body
Indenting the
body is
mandatory!

50. Example program
a = 20 ; b = 20
if ( a == b ):
print( “a and b are equal”)
print(“If block ended”)
Output
a and b are equal
If block ended
50

51. ALLOWABLE RELATIONAL OPERATORS FOR
BOOLEAN EXPRESSIONS
if (operand relational operator operand) then
Ex: if (a == b)
Python Mathematical
operator equivalent Meaning Example
< < Less than 5 < 3
> > Greater than 5 > 3
== = Equal to 5 == 3
<= ≤ Less than or equal to 5 <= 5
>= ≥ Greater than or equal to 5 >= 4
!= ≠ Not equal to 5 != 5

52. IF-ELSE STATEMENT
• checks the expression and executes the if block when the expression is True
otherwise it will execute the else block of code.
if (expression):
Statement
else:
Statement
52
Program
weather = "rainy"
if (weather == "sunny"):
print("It's a beautiful day! I will go outside.")
else:
print("It's not sunny today. I will stay indoors.")
Output
It's not sunny today. I will stay indoors.

53. Example program
number1 = 20 ; number2 = 30
if( number1 >= number2 ):
print(“number 1 is greater than number 2”)
else:
print(“number 2 is greater than number 1”)
Output
number 2 is greater than number 1
53
1
2
3

54. IF-ELIF LADDER
• elif keyword to chain multiple conditions one after another.
• helps to check multiple expressions and it executes the code as soon as one of the conditions evaluates to True.
if( expression1 ):
statement
elif (expression2 ) :
statement
elif(expression3 ):
statement
.
.
else:
statement
54

55. Example program
score = 85
if score >= 90:
grade = "A"
elif score >= 80:
grade = "B"
elif score >= 70:
grade = "C"
else:
grade = "F"
print("The student's grade is:", grade)
Output
The student’s grade is: B
55

56. SUMMARY AND KEY TAKEAWAYS
• Decision-making with conditional statements is a fundamental programming
concept.
• "if," "if-else," and "if-elif-else" statements enable different decision paths in
programs.
• Conditional statements are powerful tools for automating tasks and making
informed business decisions.
56