算數運算符: + - * / //(地板除) %(取余) **(冪運算) / 比較運算符 > < >= <= == !=

# ### python運算符 #(1) 算數運算符: + - * / //(地板除) %(取余) **(冪運算)
var1 = 5
var2 = 8

# +
res = var1 + var2
print(res)

# - 
res = var1 - var2
print(res)

# * 
res = var1 * var2
print(res)

# /(除法,結果一定是小數)

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

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

#如果相除的兩個含有小數,那么就在結果上加上.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

# ** (冪運算)
var1 = 3
res =var1**3
print(res)



# ### 比較運算符 > < >= <= == !=

'''最終只有兩個結果,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) 

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

'''
是2個等號,不是1個等號,1個等號是在做變量的賦值,2個是比較是否相同
if var1 == var2
    print(123)
'''

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