MODULE 6

• What are variables used for in programming?

  To store data referenced during execution
• What is a variable in programming?

  A name assigned to a value
• Do Python variables require explicit type declaration?

  No, type is inferred from assigned value
• What characters can variable names contain?

  Letters, digits, and underscores
• Can a variable name start with a digit?

  No, it cannot start with a digit
• Are variable names in Python case-sensitive?

  Yes, myVar and myvar are different
• What should be avoided when naming variables?

  Using Python keywords like if, else, for
• What are the rules for naming variables in Python?

  • Can contain letters, digits, underscores
  • Cannot start with a digit
  • Case-sensitive
  • Avoid Python keywords
• How are values assigned to variables in Python?

  Using the = operator
• What does dynamic typing mean in Python?

  Same variable can hold different types
• Can multiple variables be assigned values in one line?

  Yes, Python allows multiple assignments
• What is the benefit of assigning the same value to multiple variables?

  It initializes variables with the same value
• What does type casting refer to?

  Converting one data type into another
• What are some built-in functions for type casting in Python?

  int(), float(), str()
• How can you determine the type of a variable in Python?

  Using the type() function
• What are the two scopes of variables in Python?

  Local and global
• Where are local variables defined?

  Inside a function
• Where are global variables defined?

  Outside any function
• How can global variables be accessed inside functions?

  Using the global keyword
• What does the del keyword do in Python?

  Removes a variable from the namespace
• What happens after a variable is deleted using del?

  Accessing it results in a NameError
• What is an operator in programming?

  A symbol that operates on values
• What forms when data and operators are connected?

  Expressions
• What is the exponentiation operator in Python?

  ** (double asterisk)
• What does the exponentiation operator do?

  Raises the left argument to the right argument
• What is the result type when at least one argument of ** is a float?

  Float
• What is the result type when both arguments of ** are integers?

  Integer
• What is the multiplication operator in Python?

  * (asterisk)
• What is the division operator in Python?

  / (slash)
• What does the integer division operator (//) do?

  Returns the integer part of the division
• What is the result of integer division with integers?

  Integer result
• What happens when integer division involves floats?

  Result is always a float
• How is the result of integer division rounded?

  To the nearest lesser integer
• What does the % (percent) sign represent?

  The remainder after integer division
• What is another name for the % operator in programming?

  Modulo
• What is the addition operator in Python?

  + (plus sign)
• What is the subtraction operator in Python?

  • (minus sign)
• What is the hierarchy of priorities in Python?

  Defines which operators act first
• What does left-sided binding mean in Python?

  Calculations are conducted from left to right
• How can the same expression yield different results?

  Based on the order of operations applied