Section 1
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If you already have a variable defined by you want to add more to it later in the code how do it?
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Section 1
(50 cards)
If you already have a variable defined by you want to add more to it later in the code how do it?
Variable +=
What do you need to remember about comparing values
Comparing a string and integer value will be false
What are writing function statements useful for?
When you're waiting on an input for a variable from the user
What do you need to remember about using the print function?
1. Use lowercase for p 2. You can use single or double quotes to enclose a string Ex: print ('sanah') Print ("sanah") are equally valid
How do we just get the remainder in a division problem?
%
How do you get a program to ignore a program: make a commment
Anything written after # is ignored
Keyword arguments:
1. Define a variable in the function at the same time you define the function
What is not a boolean statement?
An opinion statement: "Cats are the best pets"
What gets printed first
"This is your desktop gets printed first"
Return stuff*num_repeats
If stuff = "row" and num_repeats = 3 then it will print Row Row Row
Boolean Variables
Giving a variable a true or false value by: A. Direct assignment or B. Setting it equal to a Boolean expression
Boolean Expressions
a statement that could be true or false
How do string together different variables
1. Print ( variable 1, variable 2, variable 3) 2. Message = variable 1 + variable 2 + " space " + variable3
How do you add variables to functions?
Def function_name (variable_name):
How do you put a number in a print with numbers and strings?
Str(variable_name)
What are the rules for creating a variable?
1. No spaces only "_" 2. Use = after variable 3. Enclose strings in "fish" (The red is the variable)
If you want to run a function then,
Do print (function (number))
Three ways to string together
1. Print (var1, "string", str(number_variable)) 2. Message = var1 + var2 + "string" 3. Return last_name + "," + first_name
Is this a boolean statement? "Sunday starts with the letter "C"?
Yes- even though it's always false
How do you call a function after it's been defined? WHAT DO YOU NEED TO REMEMBER?
Function_name () - don't leave in preceding space for the function
What's the purpose of return
Return permanently assigns those variables those quantities when a function is run, so that those variables return their values outside the function
What's the problems with stats.mode?
It only gives the smallest mode value `
How do you do computations
Print (number * number)
How do you take the square root of something using exponents
Raise it to the power of 0.5
Can we use a formal parameter outside the function
NO! It's outside the scope of it's definition
Returning a string
How do you print strings and variables together and watch out for spaces
1. STRINGS AND VARIABLES: print ("string" + variable) 2. Watch out for spaces by just putting a space in between the quotes
Exponents in python
Use the notation: **
We have multiple lines of strings that we want to call again and again. How do we make it easier?
Use functions
You want to put a bunch of lines of string to be printed how do you ensure no confusion with the quotes and stuff
Use three double or single quotes and don't forget equal sign after the variable
Floating point number
Decimal number
How do you find the mode of a data set?
1. From scripy import stats 2. Example_array = np.array([24,25,26,27,63)] 3. Example_mode = stats.mode(example_array)
Return doesn't use what And functions definitely have what?
Functions defining have a colon And return doesn't have an =
Strings
Blocks of text
Output a list of phrases
Print ()
How to run multiple formal parameters
Separate by comma
How do you check if two values are not equal to each other
<<< "7" != 7 True
How do you check if two values equal each other
<<< 7==7
What is return useful for?
It gives you the output of adding together multiple variables, BUT return doesn't print so you have to do print (function (x,y)).
When do you define the formal parameter?
When you run the function
When you call back your function remember
To put quotes around string
Name Error
1. Python sees a word it doesn't recognize 2. Look like a variable but wasn't defined * forgot to put quotes around a string
Formal parameter
Goes in the parenthesis of a function
What is return? Returning multiple variables
1. It prints and gives the variable it's new value permanently Return variable_name/5
How do we give a variable name to the outputs of a function
How to find the median of an array?
Variable1 = np.median (variable2), where variable 2 = array of numbers
What do you need to remember about keyword arguments?
Once you've given a variable a default value, then it cannot be a followed by another variable used by positionally
How do you define a function
Def loading_screen (): "Def" + variable_name + parenthesis + ":"
Write a function that gives the square root of variable num
Section 2
(17 cards)