Goal: to build up a text base calculator

Functions with Inputs

def my_function(something):
    #Do this with something
		#Then do this
		#Finally do this

Function with Outputs

def my_function(): 
		result = 3 * 2
		return result #return is a keyword for outputs

day10-start.py

def format_name(f_name,l_name):
    if f_name=="" or l_name=="":
        return "You don't provide valid inputs"
    formated_f_name = f_name.title()
    formated_l_name = l_name.title()
    return f"{formated_f_name} {formated_l_name}"

firstname = input("what is your first name?")
lastname = input("what is your last name?")
formated_string = format_name(firstname,lastname)
print(formated_string) #formated_string variable with return result by invoked format_name

Multiple return values

1. 最後一個 return 之後不能再接任何process
2. if f_name=="" or l_name=="": return #可不接任何輸出, return. 也可以包含輸出
3. return f"{formated_f_name} {formated_l_name}"

day10-1-exercise.py (my code)

def is_leap(year):
    if year%4==0 and year%100==0 and year%400==0:
        return True
    elif year%4==0 and year%100!=0:
        return True
    else:
        return False

def days_in_month(year, month):
    if not (month > 0 and month < 13):
        return "Your input is invalid!"
    month_days =[31,28,31,30,31,30,31,31,30,31,30,31]
    if is_leap(year) and month==2:
        return 29
    return month_days[month-1]

leap_year = int(input("Please input Year to check leap year. "))
print(f"is leap year? {is_leap(leap_year)}")

year = int(input("Enter a year: "))
month = int(input("Enter a month: "))
days = days_in_month(year, month)

print(days)

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