Table of Content

Comments

A comment is a part of the coding file that the programmer does not want to execute, rather the programmer uses it to either explain a block of code or to avoid the execution of a specific part of code while testing.

Python supports both single-line and multi-line comments.

Single-Line Comments:

To write a comment just add a ‘#’ at the start of the line.

python

# This is a single-line comment

"""
This is a
multi-line comment
"""

# Example dictionary
my_dict = {
    "name": "John",
    "age": 30,
    "city": "New York"
}

# Accessing values using keys
print(my_dict["name"])  # Output: "John"
print(my_dict["age"])   # Output: 30

Output:

python

John
30

Multi-Line Comments

To write multi-line comments you can use ‘#’ at each line or you can use the multiline string.

python

'''
This is a multiline comment
in Python using triple single quotes.
It can span multiple lines.
'''

"""
This is another way to write
a multiline comment in Python using
triple double quotes. It can also span
multiple lines.
"""


'''
Calculates the average of grades.
'''

# List of student grades
grades = [85, 90, 75, 88]

# Calculate the average
average = sum(grades) / len(grades)

print("The average grade is:", average)

Output:

python

The average grade is: 84.5

Notice how the commented part does not affect the execution of the program.