You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
53 lines
2.2 KiB
53 lines
2.2 KiB
For starters we are going to cover some basic usage of variables. Variables are used to store values to be read and manipulated.
|
|
For example we can create a variable named "name" and store the value of the string "Brett" in it.
|
|
\begin{lstlisting}
|
|
name = "Brett"
|
|
\end{lstlisting}
|
|
|
|
Fairly simple to start with.
|
|
\newline
|
|
\\
|
|
|
|
So here we are storing a string into a variable but what about other types of data? Each programming language supports different data types
|
|
but for the most part they all support numbers, usaully various types, strings as well as booleans (true or false).So, we can store these
|
|
different data types in variables as well.
|
|
|
|
\begin{lstlisting}
|
|
name = "Brett"
|
|
number = 10
|
|
boolean = false
|
|
\end{lstlisting}
|
|
|
|
Great, we can store values into a variable to use, but what do you mean use them? Well we can either use the variable names to access
|
|
the values that we stored in them or we can manipulate the values stored in variables.
|
|
|
|
\begin{lstlisting}
|
|
name = "Brett"
|
|
print name
|
|
\end{lstlisting}
|
|
|
|
Here we are storing the string "Brett" into the variable "name" and then printing the value stored in name. Here we are showing that
|
|
we can access the original string value "Brett" from the variable "name".
|
|
|
|
\begin{lstlisting}
|
|
a = 10
|
|
b = 5
|
|
c = a + b
|
|
print c
|
|
\end{lstlisting}
|
|
|
|
Ok, so here we are taking the number, or integer, value 10 and storing it into the variable "a", and the integer value 5 and storing it into
|
|
the variable "b". Then we are using the mathematical opperator for addition (+) to store the addition of the values stored by
|
|
"a" and "b" into the variable "c". Lastly, we are printing the value of "c" which if all works as we would like would print "15".
|
|
\newline
|
|
This is another example of showing how we can access the values stored within variables and act upon them. In this case we are accessing
|
|
the values 10, stored in "a", and 5, stored in "b", and performing mathematical opperations on them.
|
|
|
|
\begin{lstlisting}
|
|
a = 10
|
|
a = a + 5
|
|
print a
|
|
\end{lstlisting}
|
|
|
|
In this example we are storing the integer value 10 into the variable "a" and then we are manipulating the value of a in such a way that we
|
|
are adding the integer value 5 to it. Lastly, we are printing the final value of "a", which will be "15".
|