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Learn Python from Scratch
course content

Course Content

Learn Python from Scratch

Learn Python from Scratch

1. The basics
Hello, World!Hello, me!VariablesCommentsIndentationNumbers and strings
2. Arithmetic operations
AdditionMultiplication and powerDivision and whole part division
3. Common data types
Data typesNumbersfloat and intStoring textStrings slicingConcatenation
4. Conditional statements
Boolean data typeCombining conditionsSimple if/else expressions (1/2)Simple if/else expressions (2/2)If/else expressions with multiple conditions (1/2)If/else expressions with multiple conditions (2/2)
5. Other data types
Lists (1/3)Lists (2/3)Lists (3/3)Tuples (1/3)Tuples (2/3)Tuples (3/3)Dictionaries (1/2)Dictionaries (2/2)
6. Loops
while loop (1/2)while loop (2/2)for loop (1/5)for loop (2/5)for loop (3/5)for loop (4/5)for loop (5/5)
7. Functions
Built-in functionsWriting your own functions (1/5)Writing your own functions (2/5)Writing your own functions (3/5)Writing your own functions (4/5)Writing your own functions (5/5)lambda functions

Writing your own functions (2/5)

All we have learned till now can be used inside the function. For example, you can easily put conditional statements inside the function body.

For example, we can define a function that will check if the number is odd or even.


              
12345678910

            
# define a function
def is_odd(n):
  if n % 2 == 0:
    return "even"
  else:
    return "odd"

# testing function
print('2 is', is_odd(2))
print('3 is', is_odd(3))
copy

Task

Define a function is_positive checking if the number is positive (in that case return positive), negative (return negative), or equals zero (return zero).

Task

Define a function is_positive checking if the number is positive (in that case return positive), negative (return negative), or equals zero (return zero).

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Section 7. Chapter 3
toggle bottom row

Writing your own functions (2/5)

All we have learned till now can be used inside the function. For example, you can easily put conditional statements inside the function body.

For example, we can define a function that will check if the number is odd or even.


              
12345678910

            
# define a function
def is_odd(n):
  if n % 2 == 0:
    return "even"
  else:
    return "odd"

# testing function
print('2 is', is_odd(2))
print('3 is', is_odd(3))
copy

Task

Define a function is_positive checking if the number is positive (in that case return positive), negative (return negative), or equals zero (return zero).

Task

Define a function is_positive checking if the number is positive (in that case return positive), negative (return negative), or equals zero (return zero).

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Section 7. Chapter 3
toggle bottom row

Writing your own functions (2/5)

All we have learned till now can be used inside the function. For example, you can easily put conditional statements inside the function body.

For example, we can define a function that will check if the number is odd or even.


              
12345678910

            
# define a function
def is_odd(n):
  if n % 2 == 0:
    return "even"
  else:
    return "odd"

# testing function
print('2 is', is_odd(2))
print('3 is', is_odd(3))
copy

Task

Define a function is_positive checking if the number is positive (in that case return positive), negative (return negative), or equals zero (return zero).

Task

Define a function is_positive checking if the number is positive (in that case return positive), negative (return negative), or equals zero (return zero).

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

All we have learned till now can be used inside the function. For example, you can easily put conditional statements inside the function body.

For example, we can define a function that will check if the number is odd or even.


              
12345678910

            
# define a function
def is_odd(n):
  if n % 2 == 0:
    return "even"
  else:
    return "odd"

# testing function
print('2 is', is_odd(2))
print('3 is', is_odd(3))
copy

Task

Define a function is_positive checking if the number is positive (in that case return positive), negative (return negative), or equals zero (return zero).

Switch to desktop for real-world practiceContinue from where you are using one of the options below
Section 7. Chapter 3
Switch to desktop for real-world practiceContinue from where you are using one of the options below
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