零基础学python之数据类型number

1、a = 412print(a, type(a)) # type(x)查询x对应的值所属类型

2、a = 3.5 * 2print(a, type(a))a = int('5')print(a, type(a))f = 5.4print(f, type(f))

3、f = float('4')print(f, type(f))f = 3.14 + 5.4 # 符点数运算可能存在误差print(f)

4、age = 18height = 180.1s = 'age:%d,height:%.2f' % (age, height)print(s, type(s))

5、s = '123.456'挢旗扦渌;a, b = s.split('.') # 字符串分割，括号里是分割条件,如果不写条件，就以空格作为分割条件print(a, b)# 输入2个整数，求和a, b = input('求和：输入2个整数，用空格隔开：').split()print(int(a) + int(b))

6、# 输入2个整数，求和a, b = input('求和：输入2个整数，用空格隔开：').split()print(int(a) + int(b))

7、a 屏顿幂垂= 6b = 8s = '(a+b)*2'res = eval(s) # 将字符串的内容作为一个表达式。print(res, type(res))print(eval(input('输入一个式子,计算结果：'))