ไวยากรณ์ของ Python

1x = 5
2if x > 0:
3    print("Positive")
4else:
5    print("Non-positive")

1# This is a comment
2print("Hello, World!")  # This is also a comment

1def greet(name):
2    """
3    This function displays a greeting to the specified name.
4
5    Parameters:
6        name (str): The name of the person to greet.
7    """
8    print(f"Hello, {name}!")

1help(greet)

 1# Good example
 2# Validate user input and display a personalized message
 3
 4# Ask for the user's name
 5name = input("Enter your name: ")
 6
 7# Ask for the user's age and convert it to an integer
 8age = int(input("Enter your age: "))
 9
10# Check eligibility based on age
11if age >= 18:
12    # Inform the user that they can register
13    print(f"Welcome, {name}! You are eligible to register.")
14else:
15    # Inform the user that they are underage
16    print(f"Sorry, {name}. You must be at least 18 years old to register.")
17
18# Bad example
19# Store the user's name in the variable 'name'
20name = input("Enter your name: ")
21
22# Convert the input to an integer and store it in 'age'
23age = int(input("Enter your age: "))
24
25# Check if the user is greater than or equal to 18
26if age >= 18:
27    # Print a welcome message
28    print(f"Welcome, {name}! You are eligible to register.")
29else:
30    # Print a rejection message
31    print(f"Sorry, {name}. You must be at least 18 years old to register.")

1x = 10        # Integer
2y = 3.14      # Floating-point number
3name = "Alice"  # String (text)
4is_active = True  # Boolean value (True or False)

1x = 0
2if x > 0:
3    print("Positive")
4elif x == 0:
5    print("Zero")
6else:
7    print("Negative")

1fruits = ["apple", "banana", "cherry"]
2for fruit in fruits:
3    print(fruit)

1count = 0
2while count < 5:
3    print(count)
4    count += 1

1def greet(name):
2    print(f"Hello, {name}!")
3
4greet("Alice")

1class Dog:
2    def __init__(self, name):
3        self.name = name
4
5    def bark(self):
6        print("Woof!")
7
8dog = Dog("Fido")
9dog.bark()

1# Importing the sqrt function from the math module
2from math import sqrt
3
4result = sqrt(16)
5print(result)  # Output: 4.0

1# Catching a division-by-zero error example
2try:
3    result = 10 / 0
4except ZeroDivisionError:
5    print("Cannot divide by zero.")