python之数值计算、math库、随机数

import math
 
if __name__ == '__main__':
    # 7
    print(3+4)
    # 7.0
    print(3.0+4.0)
    # -1
    print(3-4)
    # -1.0
    print(3.0-4.0)
    # 64 4的3次方
    print(4**3)
    # 64.0
    print(4.0**3.0)
    # 5 绝对值
    print(abs(5))
    # 3.5
    print(abs(-3.5))
    # 3.33333 除
    print(10/3)
    # 3.33333
    print(10.0/3.0)
    # 3 整除
    print(10//3)
    # 3.0
    print(10.0//3.0)
    # 1 余数或模
    print(10%3)
    # 1.0
    print(10.0%3.0)
    # 3 float转int 直接丢球小数位
    print(int(3.9))
    # 3
    print(int(3.1))
    # 3.0
    print(float(int(3.2)))
    # 3 round四舍五入
    print(round(3.14))
    # 4
    print(round(3.50))
 
    pi=3.14159265358
    # 3.14 保留小数点
    print(round(pi,2))
    # 32 字符串与数字转换
    print(int("32"))
    # 32.6
    print(float("32.6"))
    # 3.141592653589793 π
    print(math.pi)
    # 2.718281828459045 e
    print(math.e)
    # 3.0 平方根
    print(math.sqrt(9))
    # -0.9880316240928618 正弦
    print(math.sin(30))
    # 0.15425144988758405 余弦
    print(math.cos(30))
    # -6.405331196646276 正切
    print(math.tan(30))
    # 0.0               反正弦
    print(math.asin(0))
    # 0.0
    print(math.acos(1))
    # 0.7853981633974483
    print(math.atan(1))
    # 2.302585092994046
    print(math.log(10))
    # 1.0 以10为底的对数
    print(math.log10(10))
    # 6  向上取整
    print(math.ceil(5.1))
    # 5 向下取整
    print(math.floor(5.1))

import random
 
if __name__ == '__main__':
    nums = [1, 99, 56, 12];
    # 找到最大数
    print(max(nums))
    # 产生随机数 1-10不包含10
    for i in range(10):
        print(random.randrange(1, 10))
    print()
    # 产生随机数 1-5不包含5 步长为2
    for i in range(10):
        print(random.randrange(1, 6, 2))
    print()
    # 产生随机数 0-1 不包含1
    for i in range(10):
        print(random.random())