Summary

r4 ™ implements as described in Michael Cowlishaw's book titled 'The Rexx Language. A Practical Approach to Programming [2nd Ed.]'.




Click here to view Kilowatt Software L.L.C.'s extensive and free Classic Rexx programming tutorial

r4 ™ provides the following >Classic Rexx keyword instructions:
address arg call do drop end exit if interpret iterate leave nop numeric options	parse procedure pull push queue return say select signal trace Plus,  assignment instructions  system command lines

r4 ™ provides the following Classic Rexx built-in functions:

abbrev abs address arg bitand bitor bitxor b2x center charin charout chars c2d c2x compare condition copies date datatype delstr delword digits d2c d2x errortext form format fuzz index insert lastpos left linein lineout lines length max min overlay pos queued random reverse right sign sourceline space stream strip substr subword symbol time trace translate trunc value verify word wordindex wordlength wordpos words xrange x2b x2c x2d

The following builtin commands are provided with r4 ™ :

Makebuf Dropbuf Newstack Delstack

The following example programs are provided with r4 ™ :

AnnVal Anova Anova2 Asc2html Ascii BJ Caldisp Caldisp2 ChgAll ChangeStr Combine CompVal CsvDef CsvMaker Csv2xml DatePick Deal Difference Easter Factor Factorial FileDef FileExtensions FinCalc Gcm GetContact Hanoi1 Hanoi2 HtmlMiner Intersection KinematicEquations Lcm LoanCalc Lottery Make Messager MetricArea MetricDistance MetricVolume MetricWeight MetricTemperature ParabolaGraph Permute Picker Powers2 PresVal PrimeFactors Prompter QuadraticFormula Qt Rexxtry Roman Sayit Sieve Sqrt Sumdisk TopoSort Union

Compute compounded value of an annuity (used with Bizzy.TopHat form) Analyze the variance of multiple columns of statistics Analyze the variance of multiple columns of statistics -- DETAILED Converts a marked up Ascii text file to HTML Dislays the Ascii character code table Blackjack -- can be executed on Palm OS version of Classic Rexx A calendar preparation program A faster calendar preparation program Replace all occurrences of one string, by another An external procedure that emulates the 'changestr' builtin function Mathematical 'combinations' -- i.e. C(52,5) Perform compound interest computation (used with Bizzy.TopHat form) Defines a new comma-separated value (CSV) file Generates comma-separated value (CSV) file form and addition program Converts comma-separated value (CSV) files to XML files Demonstration of program that uses DATEPICK.EXE Deals a hand of cards in Bridge format Computes difference between two sets Calculates Easter Identifies all of the factors that can divide a number Calculates factorial File selection dialog -- uses FileDlg accessory Discovers file extensions within a folder (directory) Financial ratio computations (used with TopHat) Computes greatest common divisor of two numbers Get contact information (used with Contact.TopHat form) A 'towers of hanoi' program Animated 'towers of hanoi' program Extracts text from an HTML file that is not within tags -- an HTML miner Computes intersection of two sets Kinematic equation solver (Physics) Computes least common multiple of two numbers Perform loan computations (used with Bizzy.TopHat form) Picks 6 lottery numbers Perform directives in a make file script Demonstration of program that uses MSGBOX.EXE Metric area conversions (used with Metric.TopHat form) Metric distance conversions (used with Metric.TopHat form) Metric volume conversions (used with Metric.TopHat form) Metric weight conversions (used with Metric.TopHat form) Metric temperature conversions (used with Metric.TopHat form) Prepares a graph of a parabola, using the Poof!™ GraphIt program Mathematical 'permutations' -- i.e. P(52,5) Demonstration of program that uses PICKLIST.EXE Shows 'powers of 2' table Perform present value computation (used with Bizzy.TopHat form) Identifies all of the unique prime factors that can divide a number Demonstration of program that uses PROMPT.EXE Computes roots of a quadratic equation Shows the present time in English An interactive REXX shell Converts a number to roman numerals A tiny full function calculator Prime number algorithm -- the 'sieve of Eratosthenes' algorithm Computes square root using Newton's algorithm -- an external procedure Summarizes disk space usage Topological sort -- dependency analysis Computes union of two sets

r4 ™ includes the following auxiliary modules:
DatePick FileDlg MsgBox Prompt PickList R4XFORM™ Revu™ TopHat™	a date selection accessory a file selection accessory a message box display accessory a simple value prompt accessory a selection list accessory a program that transforms R4 programs to executable modules a colorful text file viewing accessory a fill-in-the-blank form accessory