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  1. Variables assigned in a function, including the arguments are called the local variables to the function. The variables defined in the top-level are called global variables.

  2. Variables and Data Types are two important concepts in the Python Programming Language. “Variables” are terms that hold a given piece of data, whether from the user or hard coded in the program. A “Data Type” refers to the category the programmer intends to assign to a particular piece of data.

  3. Python – Input, output and variables. Lecture 23 – COMPSCI111/111G SS 2018. Today’s lecture. What is Python? Displaying text on screen using print() Variables. Numbers and basic arithmetic. Getting input from keyboard using input() What is a programming language? formal language that specifies how to perform a computational task.

  4. In Python variables, literals, and constants have a “type”. Python knows the difference between an integer number and a string. For example “+” means “addition” if something is a number and “concatenate” if something is a string. >> ddd = 1 + 4. >> print ddd.

  5. Variables and Objects. Variables are the basic unit of storage for a program. Variables can be created and destroyed. At a hardware level, a variable is a reference to a location in memory. Programs perform operations on variables and alter or fill in their values.

  6. What do variables do? Why are types and scopes of variables important? What types of operations are used? Objectives. Understanding I/O operations. Build concepts of different types of variables. Learning about type conversions and scope. Understanding mathematical and logical operations. In programming, we process data and produce outputs.

  7. Variables, Constants, and Data Types • Strings and Escape Characters • Primitive Data Types • Variables, Initialization, and Assignment • Constants • Reading for this lecture: –Dawson, Chapter 2 –http://introcs.cs.princeton.edu/python/12types

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