#19 Python Tutorial for Beginners | If Elif Else Statement in Python

 

#19 Python Tutorial for Beginners | If Elif Else Statement in Python

Welcome back .!

My name is Ivan 20 and let's continue this series on Python. In this video, we'll talk about the CPU.

CPU Overview

The CPU has three parts:

• CU - Control Unit
• MU - Memory Unit
• ALU - Arithmetic and Logical Unit

Working with the MU

The MU, or Memory Unit, is used to store data when working with variables.

Working with the ALU

The ALU, or Arithmetic and Logical Unit, has two parts:

• AU - Arithmetic Unit
• LU - Logical Unit

The AU performs calculations such as addition, subtraction, multiplication, and division. The LU is responsible for making decisions based on conditions.

Working with the LU

The LU, or Logical Unit, allows your computer to make decisions based on certain conditions. In programming, we use the "if" statement to specify the flow of execution based on conditions.

Using the "if" Statement

The syntax of the "if" statement is as follows:

if condition:    # Code to execute if the condition is true

The code inside the "if" block will be executed only if the condition is true.

Indentation

Indentation is important in Python as it determines which statements belong to an "if" block. You should use consistent indentation, such as 4 spaces or a tab.

Nested "if" Statements

You can have an "if" statement inside another "if" statement. This is called a nested "if" statement. The code inside the nested "if" block will be executed only if the outer "if" condition is true.

Using "if" and "else"

You can use the "else" statement with an "if" statement to specify an alternative block of code to execute if the condition is false.

Using "if", "elif", and "else"

You can use multiple "if" statements with "elif" (short for "else if") and "else" to specify different conditions and code blocks to execute.

Example Code

x = 2if x == 1:    print("One")elif x == 2:    print("Two")elif x == 3:    print("Three")else:    print("Other")    

In this example, the code will print "Two" because the value of x is 2.

In Python, you can use the if statement to check if a condition is true. However, if you have multiple conditions to check, you can use the elif statement, which stands for "else if". The elif statement will only be executed if the previous conditions are false.

Let's take a look at an example:

value = 2  # You can change this value to see different outcomesif value == 1:    print("The value is 1")elif value == 2:    print("The value is 2")elif value == 3:    print("The value is 3")else:    print("Wrong input")

If you run this code, it will print "The value is 2" because the value variable is set to 2. If you change the value to something else, it will print "Wrong input" because none of the conditions match.

You can try out different combinations and see the results for yourself. Have fun coding!

Thank you for watching and don't forget to like and subscribe if you enjoyed this video!

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