About Controlling Geometry With the Parameters Manager

The Parameters Manager lists dimensional constraint parameters, reference parameters, and user variables, which you can also create, edit, and organize.

You can easily create, modify, and delete parameters from the Parameters Manager, which supports the following operations:

• Click the name of a dimensional constraint parameter to highlight the constraint in the drawing.
• Double-click a name or expression to edit it.
• Right-click and click Delete to remove a dimensional constraint parameter or user variable.
• Click a column heading to sort the list of parameters by name, expression, or value.

Use Operators in Expressions

Dimensional constraint parameters and user variables support the following operators within expressions:

Operator	Description
+	Addition
-	Subtraction or unary negation
%	Floating point modulo
*	Multiplication
/	Division
^	Exponentiation
( )	Parenthesis, expression delimiter
.	Decimal separator

Note: With imperial units, the Parameters Manager interprets a minus or a dash (-) as a unit separator rather than a subtraction operation. To specify subtraction, include at least one space before or after the minus sign. For example, to subtract 9" from 5', enter 5' -9" rather than 5'-9".

Understand Precedence in Expressions

Expressions are evaluated according to the following standard mathematical rules of precedence:

1. Expressions in parentheses first, starting with the innermost set
2. Operators in standard order: (1) unary negation, (2) exponents, (3) multiplication and division, and (4) addition and subtraction
3. Operators of equal precedence from left to right

Functions Supported in Expressions

The following functions are available for use in expressions:

Function	Syntax
Cosine	cos(expression)
Sine	sin(expression)
Tangent	tan(expression)
Arc cosine	acos(expression)
Arc sine	asin(expression)
Arc tangent	atan(expression)
Hyperbolic cosine	cosh(expression)
Hyperbolic sine	sinh(expression)
Hyperbolic tangent	tanh(expression)
Arc hyperbolic cosine	acosh(expression)
Arc hyperbolic sine	asinh(expression)
Arc hyperbolic tangent	atanh(expression)
Square root	sqrt(expression)
Signum function (-1,0,1)	sign(expression)
Round to nearest integer	round(expression)
Truncate decimal	trunc(expression)
Round down	floor(expression)
Round up	ceil(expression)
Absolute value	abs(expression)
Largest element in array	max(expression1;expression2)
Smallest element in array	min(expression1;expression2)
Degrees to radians	d2r(expression)
Radians to degrees	r2d(expression)
Logarithm, base e	ln(expression)
Logarithm, base 10	log(expression)
Exponent, base e	exp(expression)
Exponent, base 10	exp10(expression)
Power function	pow(expression1;expression2)
Random decimal, 0-1	Random

In addition to these functions, the constants Pi and e are also available for use in expressions.