python-tutorials/programs/function_param.py

def print_max(a, b):
    if a > b:
        print a, 'is maximum'
    elif a == b:
        print a, 'is equal to', b
    else:
        print b, 'is maximum'

# directly pass literal values
print_max(3, 4)

x = 5
y = 7

# pass variables as arguments
print_max(x, y)