def hello():
    print('Hello!')

def area(width, height):
    return width * height

def print_welcome(name):
    print('Welcome,', name)

def positive_input(prompt):
    number = float(input(prompt))
    while number <= 0:
        print('Must be a postive number')
        number = float(input(prompt))
    return number

name = input('Your Name: ')
hello()
print_welcome(name)
print()
print('To find the area of a rectangle,')
print('enter the width and height below.')
print()
w = positive_input('Width: ')
h = positive_input('Height: ')

print('Width =', w, ' Height =', h, ' so Area =', area(w, h))