lesson 6 字串和文字

原始碼：

types_of_people = 10
x = f'There are {types_of_people}types_of_people.'

binary = "binary"
y = f"Those who know {binary} and those who {do_not}"

print(x)
print(y)

print(f'I said {x}')
print(
 
f'I also said {y}')
hilarious = False
joke_evaluation = "Isn't that joke so funny?!{}"

print(joke_evaluation.format(hilarious))
w = "This is the left side of ..."
e = "a string with a right side."

1. f+間接列印 先給變數賦值，再用f" “內寫入格式化的文字，再將變數插入所需位置(可插入多個變數），再將語句賦值給變數3，最後列印變數3。 f”{變數1}"，f"{變數1},{變數2} 舉個栗子：

        years_old = 18
        x = f"I am {years_old} years old."
        print(x)
   

2. f+直接列印 直接在print語句中插入變數 舉個栗子：

        years_old = 18
        print(f"I am {years_old} years old.")
   

3. format+列印 定義一個變數1，再另一個語句裡留空的大括號賦值給變數2,列印時候利用.format()打印出來。 連起來其實就是字串用"{}"挖個坑.format(變數2) 再舉個栗子

      years_old = 18 
      x = "I am {} years old"
    
   
      print(x.format(years_old))