一、数据类型

1、整数： int

a = 3

b = 5

a = 3.0

b = 5.2

a = “3.0”

b = “3.ef”

type()

1、将整数转换成浮点数

a = 3

b = float(a)

print(b)

print(type(b))

2、将浮点数转换成整数

a = 3.2

b = int(a)

print(b)

print(type(b))

3、将字符串转换成整数

a = "125"

b = int(a)

print(b)

print(type(b))

4、将整数转换成字符串

a = 358

b = str(a)

print(b)

print(type(b))

5、将字符串转换成浮点数

a = "3.879"

b = float(a)

print(b)

print(type(b))

6、将浮点数转换成字符串

a = 3.7532

b = str(a)

print(b)

print(type(b))

如果要转换成的int型或是float型不是一个数，就会出错

a = "39a"

b = int(a)

a = "39a"

b = float(a)