Python Basics: Coding Exercises

###Print Functions

Basic Printing
- Write a Python program to print the following:
```
Hello, World!
```
Solution:
```
print("Hello, World!")
```
Printing Variables
- Create two variables, name and age, and print them using the print function. Use the variables to print the following:
```
My name is John and I am 25 years old.
```
Solution:
```
name = "John"
age = 25
print("My name is", name, "and I am", age, "years old.")
```

Formatted Strings

Use an f-string to print the following using the variables name and age:
```
My name is John and I am 25 years old.
```

Solution:

name = "John"
age = 25
print(f"My name is {name} and I am {age} years old.")

Indentation

Correct Indentation

The following code has incorrect indentation. Fix it so that it runs correctly:
```
def greet(name):
print(f"Hello, {name}!")

greet("Alice")
```

Solution:

def greet(name):
    print(f"Hello, {name}!")

greet("Alice")

Conditional Indentation

Write a Python program that checks if a number is positive, negative, or zero and prints the result. Ensure proper indentation is used.

Solution:

number = int(input("Enter a number: "))

if number > 0:
    print("The number is positive.")
elif number < 0:
    print("The number is negative.")
else:
    print("The number is zero.")

Comments

Single-Line Comments

Add comments to the following code explaining each line:

name = "Alice"
age = 30
print(f"{name} is {age} years old.")

Solution:

# Assign the string "Alice" to the variable 'name'
name = "Alice"
   
# Assign the integer 30 to the variable 'age'
age = 30
   
# Print the name and age using an f-string
print(f"{name} is {age} years old.")

Multi-Line Comments

Use a multi-line comment to describe what the following code does:

def add(a, b):
    return a + b

result = add(3, 5)
print(result)

Solution:

"""
This program defines a function 'add' that takes two arguments 'a' and 'b'
and returns their sum. It then calls this function with the arguments 3
and 5, stores the result in the variable 'result', and prints the result.
"""

def add(a, b):
    return a + b

result = add(3, 5)
print(result)