PYTHON DICTIONARY

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Comments

Data types

Variables

If Else

If Elif Else

Functions

For loop

While loop

Data structures

String slicing

User defined function

Local/Global variable

Validation and Try

Methods

​File I/O

Pseudocode

Modules​

What is an If-Elif-Else statement?

If-Elif-Else allows your code to split in response to what the user chooses to do. For example,  you can use If-Else to code a simple yes or no question and based on the user choice, either the Yes code will be followed or the No code will be followed. However, with If-Elif-Else you can create conditions with more than just two answers.

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Python challenge - If-Elif-Else statement

​Enter the following code in a Python code editor. Before running the code, what do you think it will do?. Press "F5" then "Enter" to run

Explanation:
The first line asks a user to enter an integer to answer the question. This number is then held within the variable called "litter". This value is then compared to the numbers pre-defined numbers in the "if" and "Elif" statements. If the number meets a condition, then that branch of the code is executed.

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Relational operators

In the example code above, two different relational operators are used, == and <=. Below is a list of relational operators that can be used in your code

Relational operator	Description
==	If the values of two operands are equal, then the condition becomes true.
!=	If values of two operands are not equal, then condition becomes true.
>	If the value of left operand is greater than the value of right operand, then condition becomes true.
<	If the value of left operand is less than the value of right operand, then condition becomes true.
>=	If the value of left operand is greater than or equal to the value of right operand, then condition becomes true.

Relational operator challenges

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Nested if statements

Is it possible to put an if statement inside and if statement?
Yes!
This is called a "nested if statement" and its away to provide extra functionality to your code

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Boolean operators

Relational operator	Description
and	both conditions either side of "and" must be true
or	One side of the "or" must be true
not	when you "not" a Boolean value, you have the opposite e.g. Not True = False

In the following examples, a boolean operators is used

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