Copy of CS-Python-Expressions-Notes-STUDENT

Python-Notes-Operations on Numbers

We have two fundamental data types for numbers. These are:

INT: This is similar to an integer value, with the exception that there is an upper bound (there is a largest integer that Python will recognize)

FLOAT: This is decimal value, again there is an upper bound for the largest floating point number Python will recognize.

We have the following operations on numbers:

Name	Symbol	Operation
Addition	+	adds two numbers (output is type dependent)
Subtraction	-	subtracts two numbers (output is type dependent)
Multiplication	*	multiplies two numbers (output is type dependent)
Division	/, or //	“/” divides two numbers (output is type dependent). “//” is the greatest integer function
Exponentiation	**	Raises a number to a power (do NOT use ^)
Remainder (modulo)	%	Provides the remainder of a division problem

Given the following code, what will be the output?

We can also convert a value to an INT or FLOAT. This value could be a number or could be text.

Given a number, int() returns the integer part of it, i.e., they round towards zero.
Given a Boolean, int() returns zero (i.e., 0, 0L, or 0.0) for False, and one (i.e., 1, 1L, or 1.0) for True.
Given a string containing a printed representation of an integer, int() returns that integer.
Similarly, given a string containing a printed representation of a number, float() returns that number.
Special cases for float() are the inputs "inf" and "-inf", representing positive and negative infinity, respectively. Given any other string, these raise a ValueError.