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CAL
Evaluates mathematical and geometric expressions
Command line: cal (or 'cal for transparent use)
CAL is an online geometry calculator that evaluates point (vector), real, or
integer expressions. The expressions can access existing geometry using the
object snap functions such as CEN, END, and INS.
You can insert AutoLISP
®
variables into the arithmetic expression and assign
the value of the expression back to an AutoLISP variable.
You can use these arithmetic and vector expressions in any command that
expects points, vectors, or numbers.
Understand Syntax of Expressions
CAL evaluates expressions according to standard mathematical rules of
precedence:
■
Expressions in parentheses first, starting with the innermost set
■
Operators in standard order: exponents first, multiplication and division
second, and addition and subtraction last
■
Operators of equal precedence from left to right
Numeric Expressions
Numeric expressions are real integer numbers and functions combined with
the operators in the following table.
Numeric operators
Operation Operator
Groups expressions ( )
Indicates exponentiation ^
Multiplies, divides * , /
Adds, subtracts +, –
The following are examples of numeric expressions:
3
3 + 0.6
Understand Syntax of Expressions | 189