Some vocabulary

• Statement
• Expression
• Argument
• Docstring
• PEP

print() function

Documentation:

• https://docs.python.org/3/library/functions.html#print

Examples:

input() function

Documentation:

• https://docs.python.org/3/library/functions.html#input
• Prompts usually end with a space (before the quote)

Examples:

Type conversion

Documentation:

• int() https://docs.python.org/3/library/functions.html#int
• float() https://docs.python.org/3/library/functions.html#float
• str() https://docs.python.org/3/library/functions.html#func-str

Examples:

Variables (Identifiers)

Documentation:

• https://docs.python.org/3/reference/lexical_analysis.html#identifiers
• Start with a lowercase letter, _ to separate words, avoid keywords

Examples:

Operators

• Arithmetic: +, -, *, **, /, //, %
• Strings: + (concatenation), * (repetition)

Examples:

Formatting

• Strings may use single quotes (') or double quotes (")
  • Single quotes are the default, but I use double quotes
• Escape sequences: \n newline, \t tab, \\ backslash
• f-strings f"{...}" (f = formatted string literal)

Examples:

Website example

See https://w3.cs.jmu.edu/mayfiecs/cs149/

• Notice the entire output is one f-string
• Multiple variables are substituted with {}
• Formatting codes like :.3f are optional

The math module

Documentation:

• https://docs.python.org/3/library/math.html
• import math at the top (after the docstring)

Examples: