數字和字符串判斷
type('9')
str
type(9)
int
num = '8asd'
num.isdigit() #判斷是否爲數字
False
num.isalpha() #判斷爲純字符
False
name = 'debug'
name.isalpha() #判斷是否爲純字符
True
number = '三'
number.isdigit()
False
number.isdecimal() #判斷是否爲十進制符
False
number.isnumeric() #判斷是否爲數數
True
num3 = '3'
num3.isdecimal()
True
num3.isdigit()
True
str_num = input('give me a number: ')
give me a number: 243242
str_num.isdigit()
True
type(str_num)
str
num = int(str_num)
type(num)
int
直接轉換爲數字類型 num = int(input('give me a number'))
總結:判斷數字範圍 isnumeric > isdigit > isdecimal