Course Content

Learn Python from Scratch

1. The basics

Hello, World!Hello, me!Variables Comments Indentation Numbers and strings

2. Arithmetic operations

Addition Multiplication and power Division and whole part division

3. Common data types

Data types Numbers float and int Storing text Strings slicing Concatenation

4. Conditional statements

Boolean data type Combining conditions Simple 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 functions Writing 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 (1/5)

In the previous examples (for example in the Conditional statements Section) we assigned different values to a variable just to check if our code works as we need. It might be uncomfortable, especially when your code is becoming larger and larger. This can be solved by using functions. To define function use syntax:


              123
            
def name_of_function(var1, var2...):
  body of function
  return smth

For example, let's define a simple function, which receives two numbers and returns their sum squared.


              123456
            
# define function
def sum_squared(a, b):
  return (a+b)**2

# call function
print(sum_squared(2,3))

Task

Define a function my_first_function with three arguments which returns the sum of tripled first number, doubled second and third and all raised to the second power. For example, for 5, 4, 3 it should return (5⋅3 + 4⋅2 + 3)^2 = 676. Test it on that numbers.

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Section 7. Chapter 2

Writing your own functions (1/5)


              123
            
def name_of_function(var1, var2...):
  body of function
  return smth

For example, let's define a simple function, which receives two numbers and returns their sum squared.


              123456
            
# define function
def sum_squared(a, b):
  return (a+b)**2

# call function
print(sum_squared(2,3))

Task

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

Everything was clear?

Thanks for your feedback!

Section 7. Chapter 2

Writing your own functions (1/5)


              123
            
def name_of_function(var1, var2...):
  body of function
  return smth

For example, let's define a simple function, which receives two numbers and returns their sum squared.


              123456
            
# define function
def sum_squared(a, b):
  return (a+b)**2

# call function
print(sum_squared(2,3))

Task

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

Everything was clear?

Thanks for your feedback!


              123
            
def name_of_function(var1, var2...):
  body of function
  return smth

For example, let's define a simple function, which receives two numbers and returns their sum squared.


              123456
            
# define function
def sum_squared(a, b):
  return (a+b)**2

# call function
print(sum_squared(2,3))

Task

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

Section 7. Chapter 2

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