u1-script-basics Flashcards
What happens when you convert a float to an integer in Python?
All information after the decimal point is lost (truncated). For example, int(5.356) becomes 5.
How can you make long numbers more readable in Python code?
You can use underscores (_) between digits to make them more readable, like 123_456_789. The underscores don’t affect the value.
What’s the difference between storing large numbers as integers vs floats in Python?
Python3 uses variable-length integers which maintain precise values, while floats (even large ones) have limited precision due to their 64-bit representation and may lose accuracy.
How do you format a float to show a specific number of decimal places in an f-string?
Use the format specifier {variable:.Nf} where N is the number of decimal places. Example: f”{3.14159:.2f}” shows “3.14”
How do you format large numbers with comma separators in f-strings?
Use the format specifier with a comma: {variable:,d} for integers or {variable:,.Nf} for floats where N is decimal places.
What operator gives you the remainder of a division in Python?
The modulo operator (%). For example, 17 % 5 equals 2.
What operator gives you the floor division (integer division) result in Python?
The floor division operator (//). For example, 17 // 5 equals 3.
How do you convert user input from the console to a float in Python?
Use float(input(“prompt”)). The input() function returns a string which is then converted to float.
How do you format a number with leading zeros in an f-string?
Use the format specifier {number:0Nd} where N is the total width. Example: f”{42:05d}” shows “00042”
How do you format a number with a minimum width in an f-string?
Use the format specifier {number:Nd} where N is the minimum width. Example: f”{42:5d}” shows “ 42”
What’s the difference between creating two variables with the same value vs assigning one to the other?
When you assign one variable to another (b = a), both variables point to the same object. If you then change one variable, the other keeps pointing to the original object.
How do you include a variable’s value within a string in Python?
Use an f-string with the variable in curly braces: f”text {variable} more text”
What’s the difference between integer and float division in Python?
Integer division (//) always returns a whole number by rounding down, while float division (/) returns a decimal number with the exact result.
