Relative Bounds Checking (Greater, Less)

When working with data in scripts, you often need to check whether a value falls within a certain range or exceeds a threshold. Relative bounds checking uses the greater than (>) and less than (<) operators to compare values and determine their position relative to each other. This is essential for validating inputs, monitoring system metrics, and controlling program flow.

⚙️ What Are Relative Bounds?

Relative bounds checking answers questions like: - Is the CPU temperature greater than 85°C? - Is the available disk space less than 10 GB? - Is the response time between 100 ms and 500 ms?

The two primary operators for this are:

📊 Checking Upper and Lower Bounds

You can check a single bound or combine both to test if a value lies within a specific range.

Single bound check (greater than): - if cpu_temp > 85: print("Warning: CPU overheating") - This triggers only when the temperature exceeds 85.

Single bound check (less than): - if disk_free_gb < 10: print("Warning: Low disk space") - This triggers only when free space drops below 10 GB.

Double bound check (between two values): - if 100 < response_time < 500: print("Response time is acceptable") - This checks that response_time is greater than 100 AND less than 500.

🛠️ Practical Examples for Engineers

Example 1: Monitoring Memory Usage - memory_usage_percent = 87 - if memory_usage_percent > 80: print("Memory usage is high — consider scaling") - elif memory_usage_percent < 50: print("Memory usage is normal") - else: print("Memory usage is moderate")

Example 2: Validating Port Ranges - port = 8080 - if port > 0 and port < 65536: print("Port number is valid") - else: print("Port number is out of range")

Example 3: Checking Service Uptime - uptime_hours = 720 - if uptime_hours > 168: print("Service has been running for over a week") - if uptime_hours < 24: print("Service recently restarted")

🕵️ Common Pitfalls to Avoid

• Confusing greater than with greater than or equal to: Use > for strict greater, >= for inclusive. If you want to catch a value exactly at the threshold, use >= or <=.
• Forgetting to use parentheses in complex conditions: When combining bounds with and or or, wrap each comparison in parentheses for clarity. Example: (x > 10) and (x < 20) is clearer than x > 10 and x < 20.
• Using the wrong operator direction: Remember that > means "greater than" (left side is larger), and < means "less than" (left side is smaller). A common mistake is writing 10 < x when you mean x < 10.

🔍 Quick Reference

✅ Summary

Relative bounds checking with greater than and less than operators is a fundamental skill for writing logic that responds to changing conditions. Whether you're monitoring system health, validating configuration values, or controlling automated responses, these comparisons let your scripts make decisions based on real-world data. Practice combining single and double bound checks to build robust, condition-aware programs.

Relative bounds checking uses greater-than and less-than operators to test whether a value falls above or below a specific threshold.

📘 Example 1: Basic greater-than check

This example checks if one number is greater than another.

engineer_score = 85
passing_threshold = 70
result = engineer_score > passing_threshold
print(result)

📤 Output: True

📘 Example 2: Basic less-than check

This example checks if one number is less than another.

current_temperature = 22
max_safe_temperature = 30
is_safe = current_temperature < max_safe_temperature
print(is_safe)

📤 Output: True

📘 Example 3: Checking if a value is within an upper bound

This example verifies that a measurement does not exceed a maximum limit.

pipe_pressure = 95
maximum_pressure = 100
within_limit = pipe_pressure <= maximum_pressure
print(within_limit)

📤 Output: True

📘 Example 4: Checking if a value is within a lower bound

This example verifies that a measurement is at or above a minimum requirement.

battery_level = 15
minimum_battery = 10
has_enough_charge = battery_level >= minimum_battery
print(has_enough_charge)

📤 Output: True

📘 Example 5: Combined lower and upper bound check

This example checks if a value falls strictly between two thresholds.

server_load = 65
low_threshold = 20
high_threshold = 80
within_bounds = (server_load > low_threshold) and (server_load < high_threshold)
print(within_bounds)

📤 Output: True

Comparison Table: Greater / Less Operators

When working with data in scripts, you often need to check whether a value falls within a certain range or exceeds a threshold. Relative bounds checking uses the greater than (>) and less than (<) operators to compare values and determine their position relative to each other. This is essential for validating inputs, monitoring system metrics, and controlling program flow.

⚙️ What Are Relative Bounds?

Relative bounds checking answers questions like: - Is the CPU temperature greater than 85°C? - Is the available disk space less than 10 GB? - Is the response time between 100 ms and 500 ms?

The two primary operators for this are:

📊 Checking Upper and Lower Bounds

You can check a single bound or combine both to test if a value lies within a specific range.

Single bound check (greater than): - if cpu_temp > 85: print("Warning: CPU overheating") - This triggers only when the temperature exceeds 85.

Single bound check (less than): - if disk_free_gb < 10: print("Warning: Low disk space") - This triggers only when free space drops below 10 GB.

Double bound check (between two values): - if 100 < response_time < 500: print("Response time is acceptable") - This checks that response_time is greater than 100 AND less than 500.

🛠️ Practical Examples for Engineers

Example 1: Monitoring Memory Usage - memory_usage_percent = 87 - if memory_usage_percent > 80: print("Memory usage is high — consider scaling") - elif memory_usage_percent < 50: print("Memory usage is normal") - else: print("Memory usage is moderate")

Example 2: Validating Port Ranges - port = 8080 - if port > 0 and port < 65536: print("Port number is valid") - else: print("Port number is out of range")

Example 3: Checking Service Uptime - uptime_hours = 720 - if uptime_hours > 168: print("Service has been running for over a week") - if uptime_hours < 24: print("Service recently restarted")

🕵️ Common Pitfalls to Avoid

• Confusing greater than with greater than or equal to: Use > for strict greater, >= for inclusive. If you want to catch a value exactly at the threshold, use >= or <=.
• Forgetting to use parentheses in complex conditions: When combining bounds with and or or, wrap each comparison in parentheses for clarity. Example: (x > 10) and (x < 20) is clearer than x > 10 and x < 20.
• Using the wrong operator direction: Remember that > means "greater than" (left side is larger), and < means "less than" (left side is smaller). A common mistake is writing 10 < x when you mean x < 10.

🔍 Quick Reference

✅ Summary

Relative bounds checking with greater than and less than operators is a fundamental skill for writing logic that responds to changing conditions. Whether you're monitoring system health, validating configuration values, or controlling automated responses, these comparisons let your scripts make decisions based on real-world data. Practice combining single and double bound checks to build robust, condition-aware programs.

Relative bounds checking uses greater-than and less-than operators to test whether a value falls above or below a specific threshold.

📘 Example 1: Basic greater-than check

This example checks if one number is greater than another.

engineer_score = 85
passing_threshold = 70
result = engineer_score > passing_threshold
print(result)

📤 Output: True

📘 Example 2: Basic less-than check

This example checks if one number is less than another.

current_temperature = 22
max_safe_temperature = 30
is_safe = current_temperature < max_safe_temperature
print(is_safe)

📤 Output: True

📘 Example 3: Checking if a value is within an upper bound

This example verifies that a measurement does not exceed a maximum limit.

pipe_pressure = 95
maximum_pressure = 100
within_limit = pipe_pressure <= maximum_pressure
print(within_limit)

📤 Output: True

📘 Example 4: Checking if a value is within a lower bound

This example verifies that a measurement is at or above a minimum requirement.

battery_level = 15
minimum_battery = 10
has_enough_charge = battery_level >= minimum_battery
print(has_enough_charge)

📤 Output: True

📘 Example 5: Combined lower and upper bound check

This example checks if a value falls strictly between two thresholds.

server_load = 65
low_threshold = 20
high_threshold = 80
within_bounds = (server_load > low_threshold) and (server_load < high_threshold)
print(within_bounds)

📤 Output: True

Comparison Table: Greater / Less Operators