Concatenate First and Last Name into Full Name

Convert Minutes into Seconds

Learn how to convert minutes into seconds in Python using arithmetic multiplication and basic unit conversions.

1. The Challenge: Name Formatting

Create a function concat_name(first_name, last_name) that takes a first and last name and returns a single formatted string as "last_name, first_name".

2. Why It Matters

Formatting display names cleanly is standard requirement across user profiles, invoice PDF generators, and email notifications.

3. The Python Solution

Use Python f-strings (f"{last_name}, {first_name}"):

def concat_name(first_name, last_name):
    return f"{last_name}, {first_name}"

# Testing our function
print(concat_name("First", "Last"))   # Output: "Last, First"
print(concat_name("John", "Doe"))     # Output: "Doe, John"
print(concat_name("Mary", "Jane"))    # Output: "Jane, Mary"

4. Why f-Strings are Best Practice

Introduced in Python 3.6, f-strings (formatted string literals) are faster, cleaner, and less error-prone than legacy % formatting or " + " string concatenation.

5. Common Mistakes

• Wrong Order: Pay close attention to prompt requirements! Here the challenge requires "Last, First" order rather than "First Last".

6. Next Steps

Use f-strings for all string formatting. Next, let's calculate factorials in Python!