1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
|
<HTML>
<HEAD>
<TITLE>Assignments</TITLE>
</HEAD>
<BODY BGCOLOR="#FFFFFF" TEXT="#000000">
<P><A NAME="assignments"></A>
<font size=+3 color="green"><B>Assignments</B></font></P>
<P>
An assignment stores the value(s) of an expression into a
<font size="-1" face="Arial black" color="red">EXTREMA</font> variable. An
assignment has the form:
<CODE>variable = expression</CODE>
where <code>expression</code> is some combination of
constants, variables, functions, and operators. For example:</P>
<font color="blue"><PRE>
Y=A*COSD(X/10)+3.5*SIND(X/12)+C*EXP(-X)
</PRE></font>
<P>
The type of variable generated by an assignment is determined by the
expression. Input is limited to <code>255</code> characters, so to have
expressions that are longer, use character variables to store its pieces.
For example:</P>
<font color="blue"><PRE>
F1 = '2.5*COS(X/10)+3.5*SIN(X/12)+63.7*EXP(X/45)'
F2 = '1.234567*MOD(X,100)+SIN(X/1000)*EXP(X/200)'
F3 = '3.56789*X^2-2.34567*X+23.456'
Y = F1+F2+F3
</PRE></font>
<P>
<a href="expression.htm"><img src="../shadow_left.gif">
<font size="+1" color="olive">Expressions</font></a><br />
<a href="characterassignment.htm"><img src="../shadow_right.gif">
<font size="+1" color="olive">String assignments</font></a>
</P>
</BODY>
</HTML>
|
