Module 1: Data Typers, Expressions, Operations

Numeric - All Numbers

• integers, floating-point numbers, complex numbers

• Boolen Values (technically numeric: 0-Fals, 1-True)

Sequences - Order Collection

• lists, typles, ranges

• strings ( a seqience of characters)

Mapping - Key Value Collections

• dictions

Integers

whole number of any size or any value without a decimal

Floating-Point Numbers or Float

• decimal numbers with precision up to 14 decimal places

• not a number (nan)

• negative infinite (-inft)

• positive infinite (+inf)

Bankers Rounding / Rounding Half to Even

will always prefer the closest even integer

Complex

numbers with a real and an imaginary part. Any numeric value with the suffix “j“

• Example: complex_num - 12 + 2j

Boolen

This data type represents two values of true or false. Capitalize True or False

Sequence - Strings

Represented by enclosing the value in a single or double quotes

len():

return the # of characters; length of the string

replace():

replaces part of the string with another

lower/upper ():

changes strings with either lower/upper case

isnumeric():

checks if the string is a number

split():

splits strings into separate parts

int():

This function converts any value you define in between the parentheses into an integer type

float():

This function converts any value you define into a float type

str():

Convert any value you define into a string function

Concatenation

Operation of “gluing” string values together

• uses the “+” operator

• cannot perform addition with a concatenation

F-string

allows you to embed variables or expressions directly inside a string

Rounding

Add a : after the float vale then add a period. Followed by a number to the decimal place, add F if you want it fixed.

Escape Sequences

A special type of character that we can use to represent characters or formatting into a string

• \ → escpae sequence

/b:

backspace

\n:

new line

\t:

tab(indentation)

\”:

double-quote

\\:

backslash

\’:

single-quote

Expression

A combination of values, variables, and operators that your computer will calculate into a value.

Literals

Simplest expressions since they do not need evaluation since they are values themselves

Operators

Whenever you use any operators, like mathematical operators

Function Call

Some are expressions, the computer must evaluate the value it returns

Logical Operators

not, and, or

Comparison Operators

• == : equality

• != : inequality

• > : greater than

• < : less than

• >=: greater/equal to

• <=: less than/equal to

• in, not it, is, is not