Number operations in python

Features summary:

Integer (int): Usually called an integer or integer, it is a positive or negative number without a decimal point

Floating point number (float): a value with a decimal point, which can also be expressed in scientific notation

Complex number (complex): consists of a real number part and an imaginary number part. The expression is: a + bj or complex(a, b), where a is the real part and b is the imaginary part

Common categories of numbers:

1. Mathematical functions (mainly perform various mathematical calculations, such as calculating absolute values, power operations, square roots, etc., mainly defined in the math module)
2. Random number function (mainly used for processing random numbers, for example, generating random numbers is mainly defined in the random module)
3. Trigonometric function (mainly used to convert numerical values ​​into corresponding triangular radian values, mainly defined in cmath module)

 

Test result display:

import cmath
import random

a=12.1
b=10

#浮点数转换为数字
print(int(a))

#整数转换为浮点数
print(float(b))

#a,b转换为复数
print(complex(a,b))

import math  #数学函数计算
c=10
d=2.3
f=-10
#绝对值计算
print(abs(f))

# 反回最大值
print(max(c, d))

# 返回最小值
print(min(c, d))

#计算y的平方
print(pow(c,2))

#计算开平方
print(math.sqrt(c))

# 计算随机数random
list=[1,2,3,4,5,6]

#从list里面任意选择一个
print(random.choice(list))

#从（0-1）之间任意选择一个数
print(random.random())

#从指定的范围(2-100按4递增的数据集)中随机选中一个
print(random.randrange(0,100,4))

#三角函数
l=90

#反余弦的弧度值
print(cmath.acos(l))

#正弦的弧度值
print(cmath.sin(l))

#余弦的弧度值
print(cmath.cos(l))

#3.14
print(cmath.pi)