下表列出了所有Python語言支持的算術運算符。假設變量a持有10和變量b持有20，則：

運算符	描述	實例
+	加法 - 對操作符的兩側加值	a + b = 30
-	減法 - 從左側操作數減去右側操作數	a - b = -10
*	乘法- 相乘運算符兩側的值	a * b= 200
/	除 - 由右側操作數除以左側操作數	b / a = 2
%	模 - 由右側操作數和餘返回除以左側操作數	b % = 0
**	指數- 執行對操作指數(冪)的計算	a**b = 10 冪為 20
//	地板除 - 操作數的除法，其中結果是將小數點後的位數被除去的商。	9//2 = 4 而 9.0//2.0= 4.0

例子:

試試下麵的例子就明白了所有的Python編程語言提供了算術運算符：

#!/usr/bin/python

a = 21
b = 10
c = 0

c = a + b
print "Line 1 - Value of c is ", c

c = a - b
print "Line 2 - Value of c is ", c 

c = a * b
print "Line 3 - Value of c is ", c 

c = a / b
print "Line 4 - Value of c is ", c 

c = a % b
print "Line 5 - Value of c is ", c

a = 2
b = 3
c = a**b 
print "Line 6 - Value of c is ", c

a = 10
b = 5
c = a//b 
print "Line 7 - Value of c is ", c

當執行上麵的程序，它會產生以下結果：

Line 1 - Value of c is 31
Line 2 - Value of c is 11
Line 3 - Value of c is 210
Line 4 - Value of c is 2
Line 5 - Value of c is 1
Line 6 - Value of c is 8
Line 7 - Value of c is 2