Introduction to Boolean Logic and Comparisons

Boolean logic and comparison operators are essential for decision-making in programming. They allow you to compare values and combine conditions.

In this lesson, you’ll learn about logical operators (and, or, not) and comparison operators (==, !=, <, >, etc.).

What is Boolean Logic?

Boolean logic deals with True or False values. These values are the result of logical and comparison operations.

For example:

# Boolean example
is_sunny = True
print(is_sunny)

Logical Operators

Logical operators combine conditions. Here are the main ones: 

• and: Both conditions must be true. 
• or: At least one condition must be true. 
• not: Reverses the condition.

For example:

# Logical operators example
x = 5
y = 10
print(x > 3 and y > 8)
print(x > 3 or y < 5)
print(not x > 3)

Comparison Operators

Comparison operators compare values and return True or False. Here are some examples:

• ==: Equal to
• !=: Not equal to
• <: Less than
• >: Greater than
• <=: Less than or equal to
• >=: Greater than or equal to

Examples of Comparison Operators

Let’s look at some examples:

# Comparison operators example
x = 10
y = 20
print(x == y)
print(x != y)
print(x < y)

Combining Logical and Comparison Operators

You can combine logical and comparison operators for complex conditions:

# Combining logical and comparison operators
x = 15
y = 10
z = 20
print(x > y and z > x)

Practical Example

Let’s use what we’ve learned in a practical example:

# Practical example
age = 18
has_license = True
if age >= 18 and has_license:
    print("You can drive.")
else:
    print("You cannot drive.")

Common Mistakes with Logical and Comparison Operators

Here are some common mistakes to avoid:

• Using = instead of == for comparisons.
• Forgetting to use parentheses for clarity in complex conditions.

What Did We Learn?

In this lesson, you learned:

• The basics of Boolean logic.
• Logical operators: and, or, not.
• Comparison operators: ==, !=, <, >, etc.
• How to combine logical and comparison operators.

Great job! Let’s move on to the next topic.