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Questions and Answers
What will the variable type of 's' be after executing the statement 's = input("Enter temperature: ")'?
What will the variable type of 's' be after executing the statement 's = input("Enter temperature: ")'?
- Integer
- Float
- String (correct)
- None of the above
Which of the following statements correctly converts a string input to a float?
Which of the following statements correctly converts a string input to a float?
- t = str(input("Enter temperature: "))
- t = float(s) (correct)
- t = int(s)
- t = char(s)
What is the purpose of the 'if t>0:' statement in a code where 't' numerically represents temperature?
What is the purpose of the 'if t>0:' statement in a code where 't' numerically represents temperature?
- To initiate a loop
- To check if the temperature is greater than zero (correct)
- To prompt for input again
- To handle exceptions
Which data type is used for variables that hold decimals in Python?
Which data type is used for variables that hold decimals in Python?
Which statement is true about variable names in Python?
Which statement is true about variable names in Python?
What type of error will occur if an arithmetic operation is performed with a string and an integer in Python?
What type of error will occur if an arithmetic operation is performed with a string and an integer in Python?
What will happen if you try to convert the string '7A' to an integer?
What will happen if you try to convert the string '7A' to an integer?
What is the correct behavior of the expression 'int(s)' when s = '7.5'?
What is the correct behavior of the expression 'int(s)' when s = '7.5'?
What is specifically noted about how Python and Java handle trailing spaces?
What is specifically noted about how Python and Java handle trailing spaces?
Regarding the int variable 'j' when s = '7A', which statement is correct?
Regarding the int variable 'j' when s = '7A', which statement is correct?
What output will the expression + (12, 2.5) produce?
What output will the expression + (12, 2.5) produce?
What happens if the input format provided to scicalc.py contains excessive spaces?
What happens if the input format provided to scicalc.py contains excessive spaces?
Which function is used to convert a number to a string in Python?
Which function is used to convert a number to a string in Python?
What will happen if you attempt to convert a non-numeric string to an integer using the int() function?
What will happen if you attempt to convert a non-numeric string to an integer using the int() function?
Why can’t a float be used as an index in an array?
Why can’t a float be used as an index in an array?
Which function would you use to round a number to a specific number of decimal places?
Which function would you use to round a number to a specific number of decimal places?
Which of the following represents a valid conversion from string to float?
Which of the following represents a valid conversion from string to float?
What is the output of str(5) + str(3)?
What is the output of str(5) + str(3)?
Which data type cannot be created from the bool() function?
Which data type cannot be created from the bool() function?
Which relational operator would correctly evaluate the comparison of two strings based on lexicographical order, as in ‘ABC’ less than ‘ADC’?
Which relational operator would correctly evaluate the comparison of two strings based on lexicographical order, as in ‘ABC’ less than ‘ADC’?
In the context of operator precedence, which operator has the lowest precedence level?
In the context of operator precedence, which operator has the lowest precedence level?
To determine a student's pass/fail status based on their course mark, which logical comparison would you use for a ‘Pass’?
To determine a student's pass/fail status based on their course mark, which logical comparison would you use for a ‘Pass’?
What is the output of the expression + (5, 3) according to the program's expected behavior?
What is the output of the expression + (5, 3) according to the program's expected behavior?
Given that a mark of 80 or above corresponds to a letter grade ‘A’, what range should a student fall under to receive a ‘C’ grade?
Given that a mark of 80 or above corresponds to a letter grade ‘A’, what range should a student fall under to receive a ‘C’ grade?
When using conditional statements for grading, how should the indentation level be maintained?
When using conditional statements for grading, how should the indentation level be maintained?
How should inputs be formatted for the program to evaluate them correctly?
How should inputs be formatted for the program to evaluate them correctly?
What would the expression - (15, 5) return when processed by the program?
What would the expression - (15, 5) return when processed by the program?
What limitation is placed on the programming constructs used in the solution?
What limitation is placed on the programming constructs used in the solution?
If presented with the input / (20, 4), what should the output be?
If presented with the input / (20, 4), what should the output be?
Which of the following expressions would return a remainder?
Which of the following expressions would return a remainder?
In the provided context, what does a Boolean expression evaluate to?
In the provided context, what does a Boolean expression evaluate to?
Flashcards
Integer (int)
Integer (int)
A whole number, including positive, negative, and zero.
Floating-point number (float)
Floating-point number (float)
A number with a decimal point.
String (str)
String (str)
A sequence of characters (letters, numbers, symbols).
Variable name rules
Variable name rules
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Python keywords
Python keywords
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Strongly typed
Strongly typed
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Operator precedence
Operator precedence
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Character (Python)
Character (Python)
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ord()
ord()
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chr()
chr()
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str() conversion
str() conversion
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round()
round()
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Boolean (bool)
Boolean (bool)
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Relational operators
Relational operators
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Logical operators
Logical operators
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Boolean Expression
Boolean Expression
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if statement
if statement
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else statement
else statement
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if...elif...else
if...elif...else
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Arithmetic operators
Arithmetic operators
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Parentheses
Parentheses
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Exponentiation
Exponentiation
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Data Variables
Data Variables
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Modulo operator (%)
Modulo operator (%)
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Study Notes
Data Types
intrepresents natural numbers including negatives (e.g. 0, 1, -1, 2, -2)floatrepresents real numbers with decimals (e.g. -23.5, -9, 0, 0.5, 1, 2.34)strrepresents alphanumeric character strings (e.g. "ITM200", "123ER")
Data Variables
- Variable names can be any alphanumeric sequence, but cannot start with a numeral.
- Variable names are case-sensitive.
- Variable names cannot be Python keywords.
- Variables can hold different data types dynamically.
- Python is strongly typed, meaning incompatible data type operations will cause runtime errors.
Arithmetic Operators
- Operators in Python follow standard order of operations:
- Evaluate expressions within parentheses first.
- Evaluate exponentiation (
**). - Evaluate multiplication, division, modulo, and floor division (
*,/,%,//). - Evaluate addition and subtraction (
+,-).
Characters in Python
- Python doesn't have a separate character data type.
- A character is a string of a single character.
ord()function returns ASCII/Unicode value of a character.chr()function returns the character for a given ASCII/Unicode value.
Formatting Outputs
str(n)convertsnto a string to allow concatenation using+.round(x, n)roundsxtondigits after the decimal point.
Boolean (Bool) Data Type
- Represents True or False values.
- Used in logical expressions to evaluate conditions.
Boolean Expressions
- Boolean Expressions are used to ask questions which can evaluate to True or False.
- Relational operators are used in boolean expressions to compare variables:
<(less than),>(greater than),>=(greater than or equal to),==(equal to),!=(not equal to)
- Logical operators work on boolean expressions:
and,not,or
Rules of Operator Precedence
- Parentheses (
()) have the highest precedence. - Exponentiation (
**) has the second highest. - Multiplication, Division, Modulo, and Floor Division (
*,/,%,//) come next. - Addition and Subtraction (
+,-) have the lowest precedence. - Logical operators
not,and, andorhave their own precedence levels.
Simple Decision
- The
ifstatement allows conditional code execution. - The
elsestatement provides an alternative code block to be executed when theifcondition is not met.
Exercise Notes
- Exercise 1, 2, 3, 4, 5, 6 focus on manipulating strings and converting data types.
- Homework instructions require a Python program named
scicalc.pyto evaluate arithmetic expressions. - The program should support various arithmetic operations (+,-,*,/,%) and handle user input.
- Program should handle spaces within input expressions and only use basic constructs learned so far.
W3 - Decision
- This section introduces decision-making in Python.
- Boolean Expressions are key to making these decisions.
if-elseandif-elif-elsestatements provide different paths of code execution depending on conditions.
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Description
This quiz tests your knowledge of Python data types, variable naming rules, and arithmetic operators. Understand how integers, floats, and strings work, as well as the importance of Python's strong typing. Prepare to dive into the details of Python's operational hierarchy and character handling.
