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1.1     ! bowersj2    1: 
        !             2: A script consists of several \textbf{statements}, separated by \textbf{semi-colons}.
        !             3: A \textbf{statement\index{statement}} is the smallest kind of instruction
        !             4: to the computer. Most problems will be built from several statements. 
        !             5: 
        !             6: A script can contain \textbf{comments}, which are not interpreted as statements
        !             7: by the computer. Comments start with \textbf{\#}, and go to the end of that
        !             8: line. Thus, if a line starts with \#, the whole line is ignored. Comments
        !             9: can also begin in the middle of a line. It is a good idea to comment more
        !            10: complicated scripts, as it can be very difficult to read a large script and
        !            11: figure out what it does. It is a \emph{very} good idea to adopt some sort
        !            12: of commenting standard, especially if you are working in a group or you believe
        !            13: other people may use your problems in the future.
        !            14: 
        !            15: \begin{itemize}
        !            16: \item One of the simplest statements in LON-CAPA is a \textbf{variable assignment}.
        !            17: A \textbf{variable} can hold any value in it. The variable name must start
        !            18: with a \textbf{\$}. In the \textbf{Script}, you need to assign to variables
        !            19: before you use them. Put this program into the \textbf{Script} field of the
        !            20: Numerical Response:
        !            21: 
        !            22: \begin{lyxcode}
        !            23: \$variable~=~3;
        !            24: \end{lyxcode}
        !            25: This creates a variable named \textbf{variable} and assigns it the value
        !            26: of {}``3''. That's one statement.
        !            27: 
        !            28: \end{itemize}
        !            29: Variable names are \emph{case sensitive}, must start with a letter, and can
        !            30: only consist of letters, numbers, and underscores. Variable names can be
        !            31: as long as you want.