REMEMBER! Assignment changes the value of a VARIABLE, not what is stored in the memory address!<\/p>\n\n\n\n
Additional Notes from this Lesson:<\/em><\/p>\n\n\n\n – In IDLE, you can access the visualizer tool by navigating through Explore > Visualize to see the state of computer memory used during the execution of your code.<\/p>\n\n\n\n typ str is Python\u2019s representation of the String type. In order to define a string literal, which is a sequence of characters, it must begin and end with either \u2018 or \u201c. Additionally, string literals can be assigned to variables. It is important to note that if your string literal needs to include a contraction or possessive, you can use \u201cs to define them. Additionally, you have the option of using \\\u2019 to refer to your \u2018 in the string, and using \u2018s to define it completely.<\/p>\n\n\n\n Strings also are able to be concatenated using the + operator, but you have to remember to include spaces where appropriate, as the + operator simply mashes the strings together and does not take any spacing into account. Additionally, you can use the * operator on strings to replicate a string any number of times. However, it\u2019s important to note that order of operations still applies when using these \u201cmathematical operators\u201d on your strings. And before you go running off to try \/ and -, no, those operators don\u2019t work and will only result in you achieving a TypeError.<\/p>\n\n\n\n In order to print by passing a single function to argument call, you\u2019ll want to produce a statement something to the effect of this:<\/p>\n\n\n\n Here\u2019s an example of how you would write functions to produce the square of a number, and print it!<\/p>\n\n\n\n NOTE! If the end of a function body is reached without executing a return statement, that function call produces value \u201cNone\u201d.<\/p>\n\n\n\n Additional Notes from this Lesson:<\/em><\/p>\n\n\n\n Triple quoted strings can span several lines. Example:<\/p>\n\n\n\n In memory, this is stored as \u2018How\\nAre\\nYou?\u2019 (\\n is the newline designation)<\/p>\n\n\n\n Character Designations!<\/p>\n\n\n\n \\t is an escape sequence for tabs<\/p>\n\n\n\n \\\\ is to print a single backslash<\/p>\n\n\n\n \\\u2019 is for \u2018 in a string<\/p>\n\n\n\n \\\u201d is for \u201c in a string<\/p>\n\n\n\n Docstring is documentation for your own functions! Make sure that these are triple quoted so they are formatted correctly. Something I thought was really neat here was that the first two lines of your docstring are what show up as the hint when you begin to type the function name.<\/p>\n\n\n\n Next comes the Design Recipe, which is crafted, of course, to make things easier for you to execute as a developer.<\/p>\n\n\n\n 1. Write examples Once defined, you can use your functions over and over again! You can even pass your function calls as arguments. Get. On. It.<\/p>\n\n\n\n Formatting note: All code belonging to a function should be indented 4 spaces.<\/p>\n\n\n\n Stack Frame: a region of computer memory for keeping track of information about a function being executed<\/p>\n\n\n\n Locak Variable: variable created inside a function body that can only be accessed within that function.<\/p>\n\n\n\n This week was awesome because it took concepts that I\u2019ve worked with before and brought them into the Python context. I\u2019m excited to see what\u2019s on tap for next week, especially since this course is also incorporating a Design Recipe, similar to Systematic Programming.<\/p>\n\n\n\n Feel free to comment here on my blog, or find me on Twitter @DokiDara<\/a>.<\/p>\n\n\n\nLesson 2: typ str<\/h2>\n\n\n\n
Lesson 3: Input\/Output & str Formatting<\/h2>\n\n\n\n
Print (\u201ctext\u201d) => text\n\nPrint(3+7-3) => 7\n\nPrint(\u201chello\u201d, \u201cthere\u201d) => hello there<\/pre>\n\n\n\n
![\"example](\"\/community\/cfs-filesystemfile.ashx\/__key\/CommunityServer.Blogs.Components.WeblogFiles\/d-coding\/1524.week2.png\" "\\"example")
<\/figure>\n\n\n\nPrint(\u2018\u2019\u2019 How\n\nAre\n\nYou?\u2019\u2019\u2019)<\/pre>\n\n\n\n
Lesson 4: Docstring & Function Help<\/h2>\n\n\n\n
Lesson 5: Function Design Recipe<\/h2>\n\n\n\n
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2. Write type contract
a. What times for the parameters?
b. What type needs to be returned?
3. Write header
a. Pick meaningful parameter names
4. Write description
a. Mention every parameter and describe your return value
5. Write body!<\/p>\n\n\n\nLesson 6: Function Reuse<\/h2>\n\n\n\n
Lesson 7: Visualizing Function Calls<\/h2>\n\n\n\n
Week 2 Summary<\/h2>\n\n\n\n
Questions\/Comments?<\/strong><\/h2>\n\n\n\n