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5 Variables Using
Block Coding
Learning Outcomes
Introduction What is Python?
What are Variables? Naming Variables
Data Types Performing Operations on Variables
Addition Operation using Block Coding
INTRODUCTION
In the previous chapters, you have learnt the basics of algorithms, flowchart and
pseudocodes. In this chapter, you are going to learn about another important component
of a program, variables.
WHAT IS PYTHON?
Python is a high level object-oriented programming language. It is a general purpose
language with interactive features. Python is an open source software and is founded by
Guido Van Rossum in 1991. Python is extensively used in:
Web Development GUI Application Development Data Analysis
Software Development Scientific Applications
WHAT ARE VARIABLES?
Variable is a name given to a location in the memory, to store
values or data. For example, you must have seen your mother
SUGAR SALT
naming boxes in the kitchen. That box has a little storage capacity
and your mother gave it a name such as, salt, sugar, tea, etc.
Variables are also similar to a box or a packet. These packets can
be named, referenced and used to perform various mathematical operations.
So, a variable has a name (to refer to it), a type (kind of data it store and its size)
and a value (data). Usually variables are used to hold one or more values, result of
calculations, etc.
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