Data Types and Arithmetic

statement : the smallest unit of code that can be executed on its own

example of an assignment : sum = first + second

expression : a piece of code that has a value

is an expression smaller and more fundamental than a statement? : yes

the data type int stands for integers and represents : whole numbers that are positive, zero, or negative

can integers have leading zeros : no

floating point limitations : mantissa and exponent

mantissa : the digits (in binary); holds about 15 significant digits; leads to rounding errors

does python have 2 division operators? : yes / and //

/ this division operator always gives a(n) : float

% finds : the remainder of division

examples of the % operator1. 6 % 32. 8 % 33. 7 % 34. 9 % 3 : 1. 02. 23. 14. 0

is ^ the same as ** in python? : no

true or false: round has either one or two arguments : true

the datatype bool represents : boolean values

boolean values are named after : George Boole

the datatype str represents : strings

str represents : a sequence of characters

converting between datatypes is also called : type casting

practice converting between datatypes:1. float(2)2. str(1.2e3)3. float("0")4. int(3.14)5. int("02")6. int(" 2 ")7. int(-4.2)8. int(4.2) : 1. 2.02. 1200.03. 0.04. 35. 26. 27. -48. 4

example of end=print("The answer is" , number , end=":" : The answer is: 45

can you use both end= and sep= in the same print statement? : yes, in either order

regression testing : whenever you change the code, go back to the beginning of the test plan and repeat all the tests in the test plan