Python functions can contain two types of arguments: positional arguments and keyword arguments.

• Positional arguments must be included in the correct order. (順序一定要正確)
• Keyword arguments are included with a keyword and equal sign.(順序不一定要依序)
  • (positional argument_位置對應)
  • (keyword argument parameter 等號定義)

# Postional Argument

def exponent(a, b):  # 定義的exponent 會print a,b 參數，給入2的3次方 argument 定值計算 print 出來
    print(a ** b)

exponent(2, 3)

def exponent(a, b):  # 定義的function 會 return a,b 參數進行a 的b 次方運算
    return a ** b

exponent(2, 3) # 為什麼執行function 時不會直接跑return value  要用print function 再包 exponent
print(exponent(2, 3))

print(exponent(3, 2)) # print (2,3) 和print(3,2) 會不同 postional arugment 是抓相對位置 (order)

-----------------------------------------------------------------------------
8
8 -->exponent (2,3)
9 ---> exponent(3,2)

# keyword argument

def exponent(a, b):
    return a ** b

print(exponent(a=2, b=3))
print(exponent(b=3, a=2)) #有keyword 定義時 就不會因為對應位置改變而有影響

------------------------
8
8 

# test 
mylist = [ 4, 6, 3, 2, 1]

print(sorted(mylist, reverse=False))
# mylist is positional argument 
# reverse = False is keyword argument