#格式化字符串：将其他类型数据按照指定格式转换成字符串
"""
1.F-String(Python 3.6+)
result = f"小明今年{age}岁了！"
2.format()
result = "小明今年{下标（可空）}岁了！".format(age)
3.%(已弃用)
result = "小明今年%d岁了！" % (age)
"""
name = "小明"
age = "20"
result = "你好" + name + "，你今年已经 " + str(age) + " 岁了！"
print(result)
#1.F-String
result1 = f"你好{name}，你今年已经 {age} 岁了！"
print(result1)
#2.format()
result2 = "你好{0}，你今年已经 {1} 岁了！".format(name, age)
print(result2)
#3.%(弃用)
#result3 = "你好%s，你今年已经 %d 岁了！" % (name, age)
