Chapter 4: Problem 18

Write an if statement that displays the message "The number is valid" if the value referenced by speed is within the range 0 through 200 .

Short Answer

Expert verified

**Answer**: To write an if statement in Python that checks if a variable 'speed' is within the range of 0 to 200 (inclusive) and displays the message "The number is valid", follow these steps: 1. Define the 'speed' variable with a value, e.g. `speed = 120`. 2. Write an if statement that checks if the value of the variable 'speed' is within the range of 0 to 200 (inclusive): ```python if 0 <= speed <= 200: print("The number is valid") ``` Now, the if statement will print "The number is valid" if the variable 'speed' is within the specified range.

Step by step solution

Define the variable 'speed'

First, define the 'speed' variable with a value, for the demonstration purposes let's assign it a value of 120. It can be replaced with a user input or any other value later on. ```python speed = 120 ```

Write the if statement

Write an if statement that checks if the value of the variable 'speed' is within the range of 0 to 200 (inclusive). If it is, display the message "The number is valid". ```python if 0 <= speed <= 200: print("The number is valid") ```

Test with different values

Test the if statement with different values for the variable 'speed' to see if the program is working correctly. ```python # Test with various values for the 'speed' variable speed = 120 if 0 <= speed <= 200: print("The number is valid") speed = -5 if 0 <= speed <= 200: print("The number is valid") speed = 250 if 0 <= speed <= 200: print("The number is valid") ``` With the above code, the "The number is valid" message should only be displayed when the value of the 'speed' variable falls within the specified range of 0 to 200.

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Write an if statement that displays the message "The number is valid" if the value referenced by speed is within the range 0 through 200 .

Short Answer

Step by step solution

Define the variable 'speed'

Write the if statement

Test with different values

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