रिटर्न मान और दायरा

def double(x):
    return x * 2
print(double(5))

def abs_val(x):
    if x < 0:
        return -x
    return x
print(abs_val(-7))

def f():
    x = 10
    print(x)
f()
# print(x)  # NameError

name = 'Alice'
def greet():
    print('Hello', name)  # reads global
greet()

counter = 0
def increment():
    global counter
    counter += 1
increment()
print(counter)

def make_counter():
    count = 0
    def inc():
        nonlocal count
        count += 1
        return count
    return inc
c = make_counter()
print(c(), c())

x = 'global'
def outer():
    x = 'enclosing'
    def inner():
        print(x)  # enclosing
    inner()
outer()

def stats(lst):
    return min(lst), max(lst), sum(lst)/len(lst)
lo, hi, avg = stats([1,2,3,4,5])
print(lo, hi, avg)

def make_adder(n):
    def adder(x):
        return x + n
    return adder
add5 = make_adder(5)
print(add5(3))

def find(lst, val):
    for i, x in enumerate(lst):
        if x == val:
            return i
    return None
print(find([1,2,3], 9))