SUMMARY

Evaluates simple arithmetic expressions.

SYNTAX

EVALUATE {TO TERM|name} {v} op v {op v ...}

where op is one of the following:

+  -  *  /  **
SQRT EXP   ALOG  ALOG10
SIN  COS  TAN
ASIN ACOS ATAN
EQ   NE  LE  GE  LT  GT
ADD  SUBTRACT  MULTIPLY  DIVIDE

INPUT

TO TERM:	Result is written to the user's terminal.
TO name:	Result is written to the blackboard variable name.
v:	An floating point or integer number. (Since all arithmetic is done in floating point, integers are converted to floating point numbers.)
op:	One of the arithmetic or logical operators listed above.

EMBEDDED ARITHMETIC FUNCTIONS

An embedded arithmetic function is a simple math operation similar to those in any programming language, e.g. FORTRAN, C, etc, and is of the general form:

( number operator number ... )

where number is a numeric value and operator is one of the following arithmetic operators:

+   -   *   /   **

All numbers are treated as real, and all arithmetic is done in double-precision floating point.

DEFAULT VALUES

EVALUATE TO TERM 1. * 1.

DESCRIPTION

This command lets you evaluate arithmetic and logical expressions. The arithmetic expression can be a compound containing more than one operator. In this case the expression is evaluated left to right. There is no nesting capability. A logical expression can contain only one operand. The result of evaluating this expression can be written to the user's terminal or to a specified blackboard variable. This blackboard variable can later be used directly in other commands. This is especially useful when writing macros. You can also get the value of a blackboard variable using the GETBB command. Previously, there was a maximum number of operators (10) in a single command. As of v101.6, there is no maximum number.

EXAMPLES

Two simple examples:

SAC> EVALUATE 2 * 3
==>  6
SAC> evaluate tan 45
==>  1.61978

Here is a sightly more complicated example:

SAC>  EVALUATE 4 * atan 1 / PI
==>  1

Finally let's repeat the previous example but this time use a blackboard variable:

SAC> evaluate to temp1 4 * atan 1
SAC> evaluate %temp1 / PI
==> 1
SAC>

SEE COMMANDS

GETBB SAC_MACROS

LATEST REVISION

2013 (v101.6a)