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20 Cards in this Set
- Front
- Back
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variable assignment
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References to a part of the program memory, and each variable has a name and an associated value.
Variables are created by using the equal sign. You are assigning a value to a variable. |
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data types
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The type of a variable's value indicates whether the value is an
integer float string boolean or a more complicated piece of data |
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Name the types of numbers referred to in Python
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integer - a number without a decimal component
float - short for floating point, the system used for keeping track of the decimal point in the internal representation of numbers on a computer. a number with a decimal point. |
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function
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a separate piece of code somewhere that you can use by calling it, possibly with parameters.
Example: the Python function TYPE tells us the type of a value. |
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string
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text
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boolean
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abbreviated to 'bool'
a value that is either True or False |
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what symbol denotes equality?
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==
double equal |
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what symbol denotes variable assignment?
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=
single equal |
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What does the following denote?
"Alexander" == "alexandER" |
That equality of a string is dependent on the capitalization of the two strings being compared.
Two strings are equal only if all the individual characters in the string are equal. Use of quotes have no effect on the strings. |
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What does this symbol mean?
!= |
not-equal-to
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Give me the integer representation of the value:
12.0 |
12
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Give me the float representation of
21.3 |
21
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What happens with converting a float type to int type?
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Python strips away the decimal component and rounds down
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What does the string conversion function called?
What does it do? |
It is called str
It accepts a single parameter. It converts any int or float into a string. |
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What are function names and type names in Python?
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They are really just variable identifiers.
They point to functions or to types instead of numbers or strings. |
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What happens when you declare a variable to a type, like int?
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Python allows that but then the function int cannot be called because it is no longer a function because we redefined int as an actual number, so all of the functionality that was built in before is now gone.
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How do you fix a function that was accidentally overwritten?
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Quit and restart the IDLE interpreter
or Restart Shell |
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What is a variable?
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A reference to a value.
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what is program state or program memory?
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The collection of variables in a programming language.
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In Python, a variable is restricted to holding values of a particular type. TRUE OR FALSE?
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FALSE
In Python, a variable is not restricted to holding values of a particular type. However, each value has a particular type associated with it, and can be tested for equality, and the type of the value has meaning when checking if two pieces of data are equal to one another. |
