# Python Arithmetic Operators Example

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Python Arithmetic Operators Example

Here is example to show how arithmetic operation can be performed :-

#!/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

Output:-

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

Lets see below another example:-

 Line Code Meaning 1 total = 9 total is assigned the value of 9. 2 total += 10 total is assigned the value of itself plus 10. This is the “shortcut” operator for addition. It is easier to type than “total = total + 10”. total now has the value of 19. 3 total -= 10 total is assigned the value of itself minus 10. This is the shortcut operator for subtraction. total now has the value of 9. 4 total *= 3 total is assigned the value of itself multiplied by 3. This is the shortcut operator for multiplication. total now has the value of 27. 5 total /= 2 total is assigned the value of itself divided by 2. This is the shortcut operator for division. total now has the value of 13, not 13.5, because / returns the integer portion of the division. 6 total = 27 7 from __future__ import division 8 total /= 2 total is assigned the value of itself divided by 2, preceded by an import from the __future__ module. What this line says is that in a future release of Python (Python 3000, to be exact), division will include the fractional portion of the result. total is now 13.5 9 total = ’9’ total is assigned the value of the character ’9’. This ’9’ is not an integer, but a string data type. Even though it looks the same as the integer 9, the program cannot use it for arithmetic calculations. 10 total += 10 total, with a string value of ’9’ is assigned the value of itself plus the integer 10. This causes a compiler error, because you cannot add a string and a number 11 total = int(total) total is converted to an integer. This only works if the string can convert to an integer. total now has the value of the integer 9. 12 total += .5 total is assigned the value of itself plus a floating point number. The datatype of total now becomes float in order to accommodate the floating point total now has the value of 9.5 13 total -= .5 total is assigned the value of itself minus a floating point number. The datatype of total is still a float, even though its decimal fraction is 0. total now has a value of 9.0 14 total = int(total) total is converted to an integer. total now has the value of 9.

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