Question

firstname = INPUT ("What is your firstname?")
lastname = INPUT ("What is your lastname?")
PRINT ("Hello " + firstname + " " + lastname + "!")


This code uses:
IterationSequencingSelection

Answer 1

The code you've provided mostly demonstrates **sequencing**, which is a fundamental concept in programming where statements are executed in a specific order, one after the other. In this case:

1. The program prompts the user to input their first name.
2. Then, it prompts the user to input their last name.
3. Finally, it prints a greeting using the provided names.

There is no visible **iteration** (looping) or **selection** (conditional statements) present in the code as it currently stands.

To elaborate on the programming concepts mentioned:

- **Sequencing**: The order in which the operations are performed.
- **Iteration**: Repeating a set of operations, typically using loops (e.g., `for`, `while`).
- **Selection**: Making decisions in code, typically done with conditional statements (e.g., `if`, `else`).

If you needed to add iteration or selection to this code, here’s a simple example:

### Adding Iteration (Using a loop)
```python
for i in range(3): # Repeat the greeting 3 times
firstname = input("What is your firstname? ")
lastname = input("What is your lastname? ")
print("Hello " + firstname + " " + lastname + "!")
```

### Adding Selection (Using an if statement)
```python
firstname = input("What is your firstname? ")
lastname = input("What is your lastname? ")
if firstname and lastname: # Check if both names are provided
print("Hello " + firstname + " " + lastname + "!")
else:
print("You didn't provide both your first name and last name.")
```

In summary, your original code primarily demonstrates **sequencing**. Adding loops or conditional statements would introduce **iteration** and **selection**, respectively.