Concatenate Strings

Summary

Learn how to join strings by concatenation and return the combined result.

Problem statement

Implement join_names(first, last) that returns a single string combining first and last name separated by a single space. The function should not modify the inputs aside from joining them with a space.

Task

Write a function that combines two name parts into a single string with a space between them.

Examples

Input format

Two string parameters: first and last.

Output format

A single string that is the concatenation of first, a space, then last.

Constraints

Do not add extra spaces beyond one between the names. Handle empty strings by still returning the single space when appropriate (e.g., '' + 'Smith' -> ' Smith').

Samples