算数运算符: +

# ### python运算符
#(1) 算数运算符: + - * / //(地板除) %(取余) **(幂运算)
var1 = 5
var2 = 8

# +
res = var1 + var2
print(res)

# - 
res = var1 - var2
print(res)

# * 
res = var1 * var2
print(res)

# /(除法,结果一定是小数)

var1 = 8
var2 = 2
res = var1/var2
print(res)

# // 地板除(整除)
var1 = 8
var2 = 2
res = var1 // var2
print(res)

#如果相除的两个含有小数,那么就在结果上加上.0
var1 = 8.0
var2 = 2
res = var1//var2
print(res)

# % 取余
print("<========>")

var1 = 7
var2 = 4
res = var1 % var2
print(res)

print("<==========>")

var1 = -7
var2 = 4
res = var1 % var2
print(res) #1
#-3+4 =1

print("<=========>")
var1 = 7
var2 = -4
res =var1 % var2
print(res)#-1
#3-4 = -1

# ** (幂运算)
var1 = 3
res =var1**3
print(res)



# ### 比较运算符  > < >= <= == !=

'''最终只有两个结果,要么是True 要么是False'''

# >
var1 = 10
var2 = 20
res = var1 > var2
print(res)

# <
var1 = 10
var2 = 20
res = var1 < var2
print(res)

# >=
var1 = 20
var2 = 20
res = var1 >= var2
print(res)

# <=
var1 = 20
var2 =20
res = var1 <= var2
print(res) 

# == 等于
var1 = 23
var2 = 21
res = var1 == var2
print(res)

'''
是2个等号,不是1个等号,1个等号是在做变量的赋值,2个是比较是否相同
if var1 == var2
    print(123)
'''

#  != 不等于
var1 = 14
var2 = 13
res = var1 != var2
print(res)