Python Conditional Statements
Conditional statements are an essential part of programming that allows you to control the flow of your code based on certain conditions. In Python, you can achieve this using if
, elif
, and else
statements. These statements help your program make decisions and execute different blocks of code based on whether specific conditions are true or false.
Table of Contents
- The
if
Statement - The
if-else
Statement - The
if-elif-else
Statement - Nested Conditional Statements
- Ternary Operator 6 Combining Conditions
- Using Logical Operators
1. The if
Statement
The if
statement is used to execute a block of code only if a certain condition is true. Here's a simple example that checks if a number is positive:
2. The if
-else
Statement
The if
-else
statement allows you to execute one block of code when a condition is true, and another block when the condition is false.Let's see an example that checks whether a number is even or odd:
3. The if
-elif
-else
Statement
The if
-elif
-else
statement is used when you have multiple conditions to check. elif
stands for "else if" and allows you to test multiple conditions in sequence. Here's an example that categorizes a student's score into different grades:
4. Nested Conditional Statements
You can also nest conditional statements within each other to handle more complex scenarios. Just be mindful of proper indentation to maintain code readability. Here's a basic example:
5. Ternary Operator
The ternary operator is a concise way to write simple if-else statements in a single line. The ternary operator (expression if condition else expression
) is a concise way to write conditional expressions.
6. Combining Conditions
You can combine conditions using logical operators and
, or
, and not
.
7. Using Logical Operators
Logical operators help you build complex conditions by combining simpler ones.