The document discusses using LaTeX to write arrays, equations, and mathematical expressions. It provides examples of using the array and tabular environments to create tables with variables and values. It also demonstrates the eqnarray environment for numbering multiple equations across multiple lines, and the equation environment for single numbered equations. Examples are given of defining functions and suppressing equation numbers using \nonumber or the equation* environment.

1. Array and Equation in LaTex
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2. Array
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Variable Time1 Time2
V1 10.2 5
V2 15 7.5
This we can do with array or tabular environment

3. © Sarita Bopalkar
begin{center}
begin{tabular}{ccc}
Variable & Current Value & Limit hline
$x$ & $ 1.234567$ & $ 1 $
$y$ & $-9.87 $ & $-12.2 $ hline
end{tabular}
end{center}
$ begin{array}{ccc}
mbox{Variable} & mbox{Current Value} & mbox{Limit} hline
x & 1.234567 & 1
Y & -9.87 & -12.2 hline
end{array} $

4. © Sarita Bopalkar
𝑓 𝑥 =
−1 𝑖𝑓 𝑥 < 0
1 𝑖𝑓 𝑥 > 0
[ f(x) = left{ begin{array}{rll}
-1 & mbox{if} & x < 0;
1 & mbox{if} & x > 0
end{array}right.
]
Example

5. Eqarray Environment
• Environment ‘eqnarray’
• It is array of equation but each row is numbered
• Syntax is eg. X=Y (1)
Y=Z (2)
• Some times when we need to use more than one line for an ‘equation,’ in which case we
need to suppress the numbering of all but one of the rows.
• nonumber command at the end causes no number
• eqnarray* environment
• Produces same result as eqnarray, but without the equation numbers
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begin{eqnarray}
x &=& y label{eqn:xy}
y &=& z label{eqn:yz}
end{eqnarray}

6. • Equation Environment
• For a single, numbered equation
• Same as specifying eqnarray with one row entering
• except that column separators (&) are not used in the equation environment
• ‘equation*’ environment, which suppresses the equation numbering.
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Equation Environment

7. Thank you
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