Basic greeter
Input
make_greeter("Hello")("Alice")
Output
Hello, Alice!
make_greeter captures 'Hello' and uses the default punctuation '!' to greet Alice.
Full lesson preview
Generate Personalized Greeters
Learn to build simple function factories using closures that produce customized greeting functions.
Python practice10 minClosures & Function FactoriesBeginnerLast updated April 13, 2026
Problem statement
Write a function make_greeter(greeting, punctuation='!') that returns a new function. The returned function should accept a single parameter name (string) and return a greeting string formatted as "{greeting}, {name}{punctuation}". The inner function must capture the values of greeting and punctuation from the enclosing scope (closure).
Task
Implement a closure that captures configuration (greeting and punctuation) and returns a reusable greeter function.
Examples
Input format
A call expression: make_greeter(greeting, punctuation)(name).
Output format
A single string with the formatted greeting.
Constraints
greeting and punctuation are strings. name is a string. The returned value must be a string formatted exactly as described.
Samples
Sample 1
Input
make_greeter("Hi", "?")("Sam")
Output
Hi, Sam?
Custom punctuation '?' is used.