Working with Numbers - Python

You can also work with numbers in Python. If you want to do some simple math (or even complicated math) try this:

#!/usr/local/bin/python #this line must be included in every program

print 1 + 1

print 4 * 4

print 6 – 2

print 8 / 2

print 10 ** 2

print (1 + 1) * 2

The above code demonstrates a list of expressions. It would print out the following:

  2

  16

  4

  4

  100

  4

If you want to mix numbers and text together, you could do this:

#!/usr/local/bin/python #this line must be included in every program

print “Spam costs two dollars.”

print “If you bought two spams it would cost”, 2 + 2

print “If you order two spams but one is bad”

print “Your refund would be”, 4 - 2

print “Of course we do catering as well”

print “We charge 1.25 cents for more than 100 spams.”

print “So a thousand spams would cost you”, 1.25 * 1000

print “Spam to the third power is”, 2 * 2 * 2

This prints out the following:

  Spam costs two dollars.

  If you bought two spams it would cost 4

  If you order two spams but one is bad

  Your refund would be 2

  Of course we do catering as well

  We charge 1.25 cents for more than 100 spams.

  So a thousand spams would cost you 1250

  Spam to the third power is 8

You will notice that some of the above statements have two arguments. A good example is the second line: “If you bought two spams it would cost”, 2 + 2. The text part is one argument, and then the math (or expression) is a second. When you use more than one argument, you must separate them using a comma. You will also note that the expression 2 + 2 is not surrounded by quotations. If it were, then the program would have printed: If you bought two spams it would cost 2+2. Since there are no quotes, it sees it as a mathematical expression and prints the result instead.