ARCHIVE - Python 10-3

portfolio

Save all of your labs and homework with comments, this means making copies. For handing in multiple files: you can use zip to compress and archive, or you can drag a folder with the files into the Dropbox.

Integer division and modulus

11/3
11/-3
-11/3
-11/ -3
11 % 3
11 % -3
-11 % 3
-11 % -3

conditional statements

Suppose you want to compute the shipping cost for a mail order catalogue. The rule is that if your total is less than $10, you add $2, for $10 but less than $20, you add $3 and for $20 or more, it is $4. How do we format the output for money?

The syntax for an if statement is:

  if <boolean expression>: 
      <block of statements>

indenting

indenting is important, whitespace is part of the program
blocks of code are indented.
how do I do multi-line comments?

Loops

while loop repeats a block of code while the boolean expression is true.

syntax:

  while <boolean expression>:
       <block of statements>

example, create a counter
example, print a rectangle of x's
example, compute the average of positive numbers