Useful Python commands

 

MegaTech- AZILAL

Useful Python commands:

1. Print Statement:
• Description: Used to display output on the console. It accepts one or more expressions as arguments and prints their values.

Example:

print("Hello, MEGATECH AZILAL!")

2. Input Function:
• Description: Used to take input from the user. It prompts the user with a message and waits for the user to enter some input, which is then returned as a string.

Example:

name = input("Enter F4T name: ")

3. Conditional Statements (if, elif, else):
• Description: Used to execute different blocks of code based on certain conditions. The if statement checks a condition, and if it's true, it executes a block of code. Optionally, elif and else can be used for additional conditions and fallbacks, respectively.

Example:

x = 10 if x > 0:     print("x is positive") elif x == 0:     print("x is zero") else:     print("x is negative")

4. Loops (for loop):
• Description: Used to iterate over a sequence (such as a list or range) or other iterable objects. It executes a block of code repeatedly for each item in the sequence.

Example:

for i in range(5):    print(i)

5. Loops (while loop):
• Description: Used to repeatedly execute a block of code as long as the condition is true. It continues execution until the condition becomes false.

Example:

x = 0 while x < 5:     print(x) x += 1

6. Functions:
• Description: Used to group code into reusable blocks. Functions take inputs (arguments), perform some computation, and optionally return a result.

Example:

def greet(name):    print("Hello,", name)

7. Lists:
• Description: Used to store multiple items in a single variable. Lists are ordered and mutable, meaning their elements can be changed.

Example:

my_list = [1, 2, 3, 4, 5]

8. Tuples:
• Description: Similar to lists but immutable, meaning their elements cannot be changed after creation. Tuples are often used to store related pieces of data together.

Example:

my_tuple = (1, 2, 3)

9. Dictionaries:
• Description: Used to store key-value pairs. Each key is unique and associated with a value. Dictionaries are unordered and mutable.(F4TSARLCOM)

Example:

my_dict = {"name": "F4T", "age": 3}

10. Sets:
• Description: Used to store unique elements. Sets are unordered and mutable, and they don't allow duplicate values.

Example:

my_set = {1, 2, 3, 4, 5}

11. List Comprehensions:
• Description: Provides a concise way to create lists by applying an expression to each item in an iterable. It's often used as a more readable alternative to traditional loops.

Example:

squares = [x**2 for x in range(5)]

12. Exception Handling (try, except):
• Description: Used to handle errors gracefully. The try block contains the code that might raise an exception, and the except block catches and handles the exception if it occurs.

Example:

try:      result = 10 / 0 except ZeroDivisionError:      print("Error: Division by zero")

 F4T SARL