# ----------------------------------------------------

# Project AETHER - Functions & Closures Demonstration

# ----------------------------------------------------

print("========================================")

print(" Project AETHER: Functions ")

print("========================================")

# 1. Creating Functions (def and fn syntax)

print("\n--- 1. Creating Functions (def & fn) ---")

def add_numbers(a, b):

return a + b

fn multiply_numbers(a, b) {

return a * b

}

print("add_numbers(15, 27) ->", add_numbers(15, 27))

print("multiply_numbers(6, 7) ->", multiply_numbers(6, 7))

# 2. Parameters & Multiple Return Values (Sequence Unpacking)

print("\n--- 2. Multiple Return Values & Unpacking ---")

def get_screen_resolution():

width = 1920

height = 1080

return width, height

w, h = get_screen_resolution()

print("Unpacked width:", w, "| Unpacked height:", h)

# 3. Default Arguments

print("\n--- 3. Default Arguments ---")

def create_server(host, port=8080, protocol="HTTP/2"):

return protocol + "://" + host + ":" + str(port)

print("Default port & protocol:", create_server("127.0.0.1"))

print("Custom port, default protocol:", create_server("localhost", 9000))

print("All custom arguments:", create_server("api.aether.org", 443, "HTTPS"))

# 4. Keyword Arguments

print("\n--- 4. Keyword Arguments ---")

def format_profile(username, role="guest", active=true):

status = "Inactive"

if active:

status = "Active"

return username + " [" + role + "] - " + status

print("Positional call:", format_profile("alice", "admin", true))

print("Keyword call (out of order):", format_profile(role="moderator", username="bob"))

print("Mixed call:", format_profile("charlie", active=false))

# 5. Variable-Length Arguments (*args and **kwargs)

print("\n--- 5. Variable-Length Arguments (*args, **kwargs) ---")

def summarize_task(task_name, *subtasks, **metadata):

print("Task:", task_name)

print("Subtasks count:", len(subtasks))

for st in subtasks:

print(" -", st)

print("Priority:", metadata["priority"])

print("Assigned to:", metadata["assignee"])

return len(subtasks)

count = summarize_task(

"Release Aether v1.2",

"Run unit tests",

"Verify Cranelift backend",

"Benchmark fibers",

priority="High",

assignee="Sami Khan"

)

print("Total subtasks scheduled:", count)

# 6. Call-Site Unpacking (*list and **dict)

print("\n--- 6. Call-Site Unpacking (* and **) ---")

def calculate_volume(length, width, height):

return length * width * height

dimensions = [5, 4, 3]

vol = calculate_volume(*dimensions)

print("Volume with unpacked list *[5, 4, 3]:", vol)

server_config = {

"host": "cluster.aether.internal",

"port": 7070,

"protocol": "gRPC"

}

server_endpoint = create_server(**server_config)

print("Endpoint with unpacked dict **server_config:", server_endpoint)

# 7. Lambda Functions and Closures

print("\n--- 7. Lambda Functions & Closures ---")

square = lambda x: x * x

print("Lambda square(9) ->", square(9))

def make_power_function(exponent):

# Lexical closure captures 'exponent'

return lambda base: base ** exponent

cube = make_power_function(3)

fourth_power = make_power_function(4)

print("Closure cube(4) ->", cube(4))

print("Closure fourth_power(3) ->", fourth_power(3))

# Higher-order function passing lambda

def transform_data(items, transform_func):

output = []

for it in items:

output.append(transform_func(it))

return output

raw_numbers = [1, 2, 3, 4, 5]

squared_numbers = transform_data(raw_numbers, lambda x: x * x)

print("Original:", raw_numbers)

print("Transformed with lambda:", squared_numbers)

# 8. Scope and Global Statement

print("\n--- 8. Scope & Global Statement ---")

app_state_counter = 0

def record_transaction(amount):

global app_state_counter

app_state_counter = app_state_counter + amount

local_shadow = "tx_" + str(amount)

print("Processed transaction:", local_shadow)

record_transaction(150)

record_transaction(350)

record_transaction(500)

print("Final module-level global counter:", app_state_counter)

print("\n========================================")

print(" All Aether Function Features Active! ")

print("========================================")