There are six types of values in python
| Types of | Explanation |
|---|---|
| Integer | int, an integer used to identify |
| Float | float, represents a real number |
| Boolean | bool, only 0 and 1 |
| Complex types | complex, complex labeling |
Determining whether the variable is the value, if the value is converted
a='123'
print(a) # 结果为：123
print(type(a)) # 结果为：<class 'str'>
b=a.isdigit()
print(b) # 结果为：True
a=int(a)
print(type(a)) # 结果为：<class 'int'>
Detailed numerical conversion
https://blog.csdn.net/GrofChen/article/details/91356830
arithmetic operators value
https://blog.csdn.net/GrofChen/article/details/89320967
There are four integer representation systems: decimal, binary, octal, hexadecimal
python integer in the range is limited: 32bit computer is -2³¹ 2³¹ computer-1,64bit -2 ^ 63 ^ 2 63 -1
a=12
print(type(a)) #结果为：<class 'int'>
Float, for example: 2.2e4, e or E represents a group index is 10,4 Flag
range: -1.79e + 308 ~ 1.79e + 308
a=2.2E4
print(a) #结果为：22000.0
Boolean value, True and false when the arithmetic operation, True is 1, false 0
a=True
b=False
print(a+b) #结果为：1
Type complex, consists of two parts, for example: 1 + 0j, 1 is a real part and the imaginary part 0, j is the imaginary unit, the real and imaginary part are floating-point
a=1+0j
print(a) # 结果为：(1+0j)
print(a.real) # 结果为：1.0
print(a.imag) # 结果为：0.0
print(type(a))# 结果为：<class 'complex'>